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Normed vector space

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All norms on a finite-dimensional vector space are equivalent from a topological viewpoint as they induce the same topology (although the resulting metric spaces need not be the same). And since any Euclidean space is complete, we can thus conclude that all finite-dimensional normed vector spaces are
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A straightforward argument involving elementary linear algebra shows that the only finite-dimensional seminormed spaces are those arising as the product space of a normed space and a space with trivial seminorm. Consequently, many of the more interesting examples and applications of seminormed
4787: 5320: 4897: 5047: 2142: 903:. Every normed vector space can be "uniquely extended" to a Banach space, which makes normed spaces intimately related to Banach spaces. Every Banach space is a normed space but converse is not true. For example, the set of the 5640:, Mathematics and its Applications (East European Series), vol. 29 (Translated from the Polish by Ewa Bednarczuk ed.), Dordrecht; Warsaw: D. Reidel Publishing Co.; PWN—Polish Scientific Publishers, pp. xvi+524, 4626: 571: 5185: 4422: 2004:. (In fact, a more general result is true: a topological vector space is locally compact if and only if it is finite-dimensional. The point here is that we don't assume the topology comes from a norm.) 1650: 3919: 990: 2430: 4792: 7121: 1782: 1506: 3050: 4563: 6904: 1107: 5596: 4621: 4512: 4180: 794: 687: 6994: 379: 3392: 3360: 2538: 2745: 2201: 1598: 736: 316: 5180: 4933: 2990: 1974: 441: 2321: 1360: 4938: 2041: 290: 7750: 7031: 3633: 3488: 3280: 3225: 883: 3723: 3558: 2488: 1534: 1388: 2954: 490: 7603: 7228: 6282: 4202: 3941: 2046: 1743: 1721: 1672: 1467: 1445: 1259: 1233: 1211: 242: 220: 7070: 6838: 4272: 4071: 3419: 7197: 6927: 3687: 3522: 2864: 2675: 2596: 2347: 2256: 2645: 2570: 2288: 1289: 1189: 4135: 5146: 2833: 3746: 3581: 628: 602: 516: 408: 346: 5117: 4320: 3657: 3446: 2765: 2391: 3113: 3078: 5070: 4245: 3820: 2788: 1884: 1695: 1423: 1150: 7266: 7223: 5340: 5090: 4462: 4222: 4115: 4091: 4033: 4013: 3989: 3969: 3868: 3793: 3769: 3328: 3300: 3245: 3187: 3165: 3135: 2924: 2904: 2884: 2695: 2450: 2367: 1998: 1920: 1855: 1835: 1554: 1310: 1127: 814: 756: 710: 461: 262: 198: 178: 158: 7877: 7852: 7429: 6337: 3636: 3491: 521: 4327: 7834: 7556: 7411: 6309: 796:
is called a normed vector space. If it is clear from context which norm is intended, then it is common to denote the normed vector space simply by
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Even if a metrizable topological vector space has a topology that is defined by a family of norms, then it may nevertheless still fail to be
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The norm is a continuous function on its vector space. All linear maps between finite dimensional vector spaces are also continuous.
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A product of a family of normable spaces is normable if and only if only finitely many of the spaces are non-trivial (that is,
1898:. On a finite-dimensional vector space, all norms are equivalent but this is not true for infinite dimensional vector spaces. 1046: 4572: 633: 6581: 6260: 6039: 3830: 1789: 6352: 1610: 8287: 7889: 7866: 7434: 6619: 6397: 6342: 3873: 2147: 7490: 6175: 5315:{\displaystyle q\left(x_{1},\ldots ,x_{n}\right):=\left(\sum _{i=1}^{n}q_{i}\left(x_{i}\right)^{p}\right)^{\frac {1}{p}}} 8338: 7717: 7439: 7424: 7252: 6454: 6444: 6404: 6372: 6299: 5844: 7454: 6382: 2396: 6792: 5768: 4117:
to the base field (the complexes or the reals) — such linear maps are called "functionals". The norm of a functional
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into a normed vector space. An important theorem about continuous linear functionals on normed vector spaces is the
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zero. These functions form a subspace which we "quotient out", making them equivalent to the zero function.
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sits as a dense subspace inside some Banach space; this Banach space is essentially uniquely defined by
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is a normed vector space whose norm is the square root of the inner product of a vector and itself. The
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on the right hand side is defined and finite. However, the seminorm is equal to zero for any function
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is defined. A norm is a generalization of the intuitive notion of "length" in the physical world. If
5609:. Monografie Matematyczne (in French). Vol. 1. Warszawa: Subwencji Funduszu Kultury Narodowej. 3692: 3527: 2455: 1511: 1365: 8282: 8277: 8235: 7814: 7623: 7561: 7275: 6800: 6757: 6571: 6294: 6024: 5831: 5466: 5394: 5373: 2929: 2803: 2218: 2206: 1793: 1601: 1155: 1040: 995: 915: 825: 575: 469: 97: 4185: 3924: 1726: 1704: 1655: 1450: 1428: 1242: 1216: 1194: 225: 203: 8267: 8210: 8159: 8155: 8144: 8129: 8125: 7996: 7986: 7648: 7515: 7233: 7144: 7048: 6811: 6782: 6778: 6767: 6737: 6733: 6554: 6512: 6119: 6029: 5974: 5821: 4250: 4049: 3397: 1785: 1021: 927: 137: 7160: 3666: 3501: 2840: 2654: 2575: 2326: 2235: 5516: 5514: 2618: 2543: 2261: 1264: 1164: 7979: 7905: 7628: 6914: 6387: 6168: 6111: 6091: 5723: 5713: 5693: 5683: 5667: 5649: 5580: 5570: 5471: 5426: 4425: 4120: 3193: 3081: 2791: 1859: 105: 5125: 2809: 1697:
is jointly continuous. This follows from the triangle inequality and homogeneity of the norm.
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Similarly, for any seminormed vector space we can define the distance between two vectors
904: 7322: 3055: 2802:: A Hausdorff topological vector space is normable if and only if there exists a convex, 5358:, normed vector spaces which are complete with respect to the metric induced by the norm 5052: 4227: 3802: 2770: 2221:, generalizations of normed vector spaces with this property are studied under the name 1866: 1677: 1405: 1132: 8378: 8327: 8042: 7684: 7536: 7337: 7134: 7082: 6999: 6742: 6608: 6255: 6245: 5864: 5816: 5325: 5075: 4447: 4207: 4100: 4076: 4018: 3998: 3974: 3954: 3853: 3778: 3754: 3586: 3313: 3285: 3230: 3172: 3150: 3120: 2909: 2889: 2869: 2680: 2435: 2352: 1983: 1905: 1840: 1820: 1808: 1539: 1295: 1236: 1112: 919: 908: 799: 741: 695: 446: 247: 183: 163: 143: 133: 8447: 8362: 8272: 8215: 8175: 8103: 8078: 8022: 7974: 7910: 7689: 7613: 7342: 7327: 7317: 7139: 6945: 6752: 6706: 6674: 6641: 6492: 6487: 6480: 6101: 6034: 6007: 5826: 5799: 5592: 5560: 5446: 5377: 4566: 2210: 2137:{\displaystyle {\mathcal {N}}(x)=x+{\mathcal {N}}(0):=\{x+N:N\in {\mathcal {N}}(0)\}} 1977: 1600:
is jointly continuous with respect to this topology. This follows directly from the
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The topology of a seminormed vector space has many nice properties. Given a
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This metric is defined in the natural way: the distance between two vectors
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Hierarchy of mathematical spaces. Normed vector spaces are a superset of
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by the subspace of elements of seminorm zero. For instance, with the
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The study of normed spaces and Banach spaces is a fundamental part of
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The most important maps between two normed vector spaces are the
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is a seminorm on the vector space of all functions on which the
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When speaking of normed vector spaces, we augment the notion of
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continuous and which is compatible with the linear structure of
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around 0 we can construct all other neighbourhood systems as
5456:, Cambridge Studies in Advanced Mathematics, vol. 125, 5391:– a vector space with a topology defined by convex open sets 4259: 4058: 3406: 3379: 3347: 3267: 3212: 2432:), which happens if and only if there exists some open ball 2117: 2077: 2052: 2019: 1508:
This topology is precisely the weakest topology which makes
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such that the topology that this norm induces is equal to
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ranges over all unit vectors (that is, vectors of norm
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a normable space because there does not exist any norm
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a normable space because there does not exist any norm
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Functional analysis and control theory: Linear systems
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Metrizable topological vector space § Normability
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spaces occur for infinite-dimensional vector spaces.
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The definition of many normed spaces (in particular,
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Normed spaces as quotient spaces of seminormed spaces
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such that the topology this norm induces is equal to
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Topological Vector Spaces, Distributions and Kernels
5682:. New York, NY: Springer New York Imprint Springer. 3914:{\displaystyle \|f(\mathbf {v} )\|=\|\mathbf {v} \|} 3659:
is defined by a countable family of norms but it is
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This also shows that a vector norm is a (uniformly)
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When the scalar field is 1183: 1144: 1121: 1101: 985:{\displaystyle d(A,B)=\|{\overrightarrow {AB}}\|.} 984: 877: 808: 788: 750: 730: 704: 681: 622: 596: 565: 510: 484: 455: 435: 402: 373: 340: 310: 284: 256: 236: 214: 192: 172: 152: 3850:between two normed vector spaces is a linear map 2866:). Furthermore, the quotient of a normable space 2425:{\displaystyle \tau _{\|\cdot \|}\subseteq \tau } 3635:whose definition can be found in the article on 3012: 2000:is finite-dimensional; this is a consequence of 712:is a real or complex vector space as above, and 7116:{\displaystyle S\left(\mathbb {R} ^{n}\right)} 5403: â€“ Vector space with a notion of nearness 1888:Two norms on the same vector space are called 1777:{\displaystyle \|\mathbf {u} -\mathbf {v} \|.} 1501:{\displaystyle \|\mathbf {u} -\mathbf {v} \|.} 7744: 7260: 7224:Mathematical formulation of quantum mechanics 5769: 3045:{\textstyle x+C\mapsto \inf _{c\in C}\|x+c\|} 8: 5397:– mathematical set with some added structure 4558:{\displaystyle q_{i}:X_{i}\to \mathbb {R} ,} 4338: 4331: 3908: 3900: 3894: 3877: 3676: 3670: 3511: 3505: 3039: 3027: 2943: 2933: 2853: 2847: 2734: 2722: 2664: 2658: 2527: 2518: 2512: 2497: 2474: 2468: 2411: 2405: 2336: 2330: 2308: 2302: 2245: 2239: 2187: 2163: 2131: 2094: 1963: 1954: 1948: 1939: 1768: 1752: 1523: 1515: 1492: 1476: 1377: 1369: 1346: 1338: 1235:), this is usually taken to be the ordinary 1091: 1085: 1079: 1073: 1062: 1050: 976: 958: 869: 857: 780: 774: 725: 719: 673: 667: 661: 655: 649: 637: 560: 554: 534: 525: 424: 418: 362: 356: 305: 299: 5385: â€“ Characterization of normable spaces 885:which makes any normed vector space into a 27:Vector space on which a distance is defined 7751: 7737: 7729: 7295: 7267: 7253: 7245: 5776: 5762: 5754: 5537:sfn error: no target: CITEREFJarchow1981 ( 4388: 3951:isometry between the normed vector spaces 3637:spaces of test functions and distributions 3593:norm). An example of such a space is the 3492:spaces of test functions and distributions 2290:is continuous if and only if the topology 417: 355: 7180: 7162: 7103: 7099: 7098: 7088: 7056: 7050: 7017: 7011: 6965: 6959: 6899:{\displaystyle B_{p,q}^{s}(\mathbb {R} )} 6889: 6888: 6879: 6868: 6862: 6813: 5465: 5342:this defines the same topological space. 5327: 5301: 5290: 5280: 5265: 5255: 5244: 5220: 5201: 5187: 5168: 5167: 5153: 5127: 5103: 5097: 5077: 5054: 5026: 5012: 5002: 4991: 4973: 4954: 4940: 4921: 4920: 4906: 4875: 4853: 4827: 4808: 4794: 4768: 4755: 4736: 4723: 4700: 4681: 4658: 4639: 4628: 4607: 4597: 4586: 4574: 4548: 4547: 4538: 4525: 4519: 4493: 4480: 4469: 4449: 4404: 4400: 4382: 4377: 4359: 4341: 4329: 4306: 4300: 4258: 4252: 4229: 4209: 4189: 4187: 4167: 4159: 4148: 4146: 4122: 4102: 4078: 4057: 4051: 4020: 4000: 3976: 3956: 3928: 3926: 3903: 3886: 3875: 3855: 3804: 3780: 3756: 3730: 3700: 3694: 3668: 3644: 3607: 3601: 3565: 3535: 3529: 3503: 3462: 3456: 3433: 3405: 3399: 3378: 3373: 3367: 3346: 3341: 3335: 3315: 3287: 3266: 3261: 3255: 3232: 3211: 3206: 3200: 3189:has a bounded neighborhood of the origin. 3174: 3152: 3122: 3094: 3089: 3062: 3057: 3015: 2997: 2978: 2977: 2966: 2961: 2936: 2931: 2911: 2891: 2871: 2842: 2811: 2772: 2752: 2702: 2682: 2656: 2620: 2577: 2545: 2495: 2457: 2437: 2404: 2398: 2378: 2354: 2328: 2301: 2295: 2263: 2237: 2149: 2116: 2115: 2076: 2075: 2051: 2050: 2048: 2018: 2017: 2015: 1985: 1931: 1907: 1868: 1842: 1822: 1763: 1755: 1750: 1730: 1728: 1708: 1706: 1679: 1660: 1659: 1657: 1623: 1622: 1618: 1614: 1612: 1571: 1567: 1565: 1541: 1522: 1518: 1513: 1487: 1479: 1474: 1454: 1452: 1432: 1430: 1407: 1376: 1372: 1367: 1345: 1341: 1327: 1297: 1276: 1268: 1266: 1247: 1246: 1244: 1221: 1220: 1218: 1199: 1198: 1196: 1176: 1168: 1166: 1134: 1114: 1102:{\displaystyle \|x-y\|\geq |\|x\|-\|y\||} 1094: 1068: 1048: 961: 935: 911:, but it is not complete for this norm. 834: 801: 763: 743: 717: 697: 635: 609: 583: 553: 548: 540: 523: 497: 471: 448: 415: 389: 353: 327: 297: 278: 277: 269: 249: 230: 229: 227: 208: 207: 205: 185: 165: 145: 80:Learn how and when to remove this message 7557:Group algebra of a locally compact group 5505: 5493: 4616:{\displaystyle X:=\prod _{i=1}^{n}X_{i}} 4507:{\displaystyle \left(X_{i},q_{i}\right)} 4175:{\displaystyle |\varphi (\mathbf {v} )|} 4046:to take the norm into account. The dual 3943:). Isometries are always continuous and 789:{\displaystyle (V,\lVert \cdot \rVert )} 682:{\displaystyle \|x+y\|\leq \|x\|+\|y\|.} 318:, satisfying the following four axioms: 91: 43:This article includes a list of general 6989:{\displaystyle L^{\lambda ,p}(\Omega )} 5532: 5413: 5389:Locally convex topological vector space 1784:This turns the seminormed space into a 1161:Property 3 depends on a choice of norm 926:is a special case that allows defining 907:of real numbers can be normed with the 374:{\displaystyle \;\lVert x\rVert \geq 0} 7890:Uniform boundedness (Banach–Steinhaus) 7229:Ordinary Differential Equations (ODEs) 6343:Banach–Steinhaus (Uniform boundedness) 5520: 5364: â€“ Concept in functional analysis 5712:. Mineola, N.Y.: Dover Publications. 4789:and scalar multiplication defined as 3387:{\displaystyle X_{\sigma }^{\prime }} 3355:{\displaystyle X_{\sigma }^{\prime }} 3330:is finite dimensional if and only if 2533:{\displaystyle \{x\in X:\|x\|<1\}} 2217:. As this property is very useful in 1902:Banach spaces. A normed vector space 7: 5567:McGraw-Hill Science/Engineering/Math 2740:{\displaystyle (x,y)\mapsto \|y-x\|} 2196:{\displaystyle x+N:=\{x+n:n\in N\}.} 1593:{\displaystyle \,+\,:V\times V\to V} 1041:variation of the triangle inequality 731:{\displaystyle \lVert \cdot \rVert } 311:{\displaystyle \lVert \cdot \rVert } 5175:{\displaystyle q:X\to \mathbb {R} } 4928:{\displaystyle q:X\to \mathbb {R} } 3144:then the following are equivalent: 2985:{\displaystyle X/C\to \mathbb {R} } 1980:, which is the case if and only if 1969:{\displaystyle B=\{x:\|x\|\leq 1\}} 1804:which is induced by the semi-norm. 1362:is a normed vector space, the norm 998:, a major subfield of mathematics. 436:{\displaystyle \;\lVert x\rVert =0} 7057: 7018: 6980: 6824: 5383:Kolmogorov's normability criterion 3870:which preserves the norm (meaning 3701: 3608: 3536: 3463: 2799:Kolmogorov's normability criterion 2316:{\displaystyle \tau _{\|\cdot \|}} 1811:normed spaces, which are known as 1674:is the underlying scalar field of 1355:{\displaystyle (V,\|\,\cdot \,\|)} 1032:is a vector space equipped with a 49:it lacks sufficient corresponding 25: 6721:Subsets / set operations 6498:Differentiation in FrĂ©chet spaces 4623:where vector addition defined as 2036:{\displaystyle {\mathcal {N}}(0)} 384:Positive definiteness: for every 285:{\displaystyle V\to \mathbb {R} } 8428: 8427: 7713: 7712: 7639:Topological quantum field theory 5741: 5598:ThĂ©orie des OpĂ©rations LinĂ©aires 4190: 4160: 3929: 3904: 3887: 3771:can be a defined by a family of 2906:is normable, and if in addition 2790:The following theorem is due to 1764: 1756: 1731: 1709: 1488: 1480: 1455: 1433: 466:Absolute homogeneity: for every 34: 8415:With the approximation property 7026:{\displaystyle \ell ^{\infty }} 3628:{\displaystyle C^{\infty }(K),} 3483:{\displaystyle C^{\infty }(K),} 3275:{\displaystyle X_{b}^{\prime }} 3220:{\displaystyle X_{b}^{\prime }} 2926:'s topology is given by a norm 2697:such that the canonical metric 1213:(or more generally a subset of 878:{\displaystyle d(x,y)=\|y-x\|.} 104:, which in turn is a subset of 7878:Open mapping (Banach–Schauder) 7186: 7167: 6983: 6977: 6893: 6885: 6827: 6821: 6415:Lomonosov's invariant subspace 6338:Banach–Schauder (open mapping) 5164: 5122:More generally, for each real 4917: 4544: 4378: 4373: 4367: 4360: 4168: 4164: 4156: 4149: 3891: 3883: 3718:{\displaystyle C^{\infty }(K)} 3712: 3706: 3619: 3613: 3553:{\displaystyle C^{\infty }(K)} 3547: 3541: 3474: 3468: 3008: 2974: 2719: 2716: 2704: 2634: 2622: 2559: 2547: 2483:{\displaystyle (X,\|\cdot \|)} 2477: 2459: 2277: 2265: 2258:on a topological vector space 2128: 2122: 2088: 2082: 2063: 2057: 2030: 2024: 1633: 1584: 1529:{\displaystyle \|\,\cdot \,\|} 1383:{\displaystyle \|\,\cdot \,\|} 1349: 1329: 1277: 1269: 1177: 1169: 1095: 1069: 952: 940: 851: 839: 783: 765: 549: 541: 274: 1: 7435:Uniform boundedness principle 5425:. New York: Springer-Verlag. 5092:is a norm if and only if all 3490:as defined in the article on 2949:{\displaystyle \|\,\cdot ,\|} 2540:for example) that is open in 2209:for the origin consisting of 1926:if and only if the unit ball 1817:. Every normed vector space 485:{\displaystyle \lambda \in K} 6300:Singular value decomposition 5454:-adic differential equations 4197:{\displaystyle \mathbf {v} } 3936:{\displaystyle \mathbf {v} } 3795:if and only if there exists 2886:by a closed vector subspace 1738:{\displaystyle \mathbf {v} } 1716:{\displaystyle \mathbf {u} } 1667:{\displaystyle \mathbb {K} } 1462:{\displaystyle \mathbf {v} } 1440:{\displaystyle \mathbf {u} } 1254:{\displaystyle \mathbb {Q} } 1228:{\displaystyle \mathbb {C} } 1206:{\displaystyle \mathbb {R} } 237:{\displaystyle \mathbb {C} } 215:{\displaystyle \mathbb {R} } 8099:Radially convex/Star-shaped 8084:Pre-compact/Totally bounded 7065:{\displaystyle L^{\infty }} 6833:{\displaystyle ba(\Sigma )} 6702:Radially convex/Star-shaped 5603:Theory of Linear Operations 4267:{\displaystyle V^{\prime }} 4066:{\displaystyle V^{\prime }} 3825:Linear maps and dual spaces 3748:In fact, the topology of a 3414:{\displaystyle X^{\prime }} 2572:(said different, such that 897:then the normed space is a 8470: 7785:Continuous linear operator 7578:Invariant subspace problem 7192:{\displaystyle W(X,L^{p})} 5458:Cambridge University Press 5421:Callier, Frank M. (1991). 5322:is a semi norm. For each 4324:, the function defined by 3682:{\displaystyle \|\cdot \|} 3517:{\displaystyle \|\cdot \|} 3052:is a well defined norm on 2859:{\displaystyle \neq \{0\}} 2670:{\displaystyle \|\cdot \|} 2605: 2591:{\displaystyle B\in \tau } 2342:{\displaystyle \|\cdot \|} 2251:{\displaystyle \|\cdot \|} 1607:The scalar multiplication 1005: 893:. If this metric space is 322:Non-negativity: for every 8423: 8130:Algebraic interior (core) 7872:Vector-valued Hahn–Banach 7760:Topological vector spaces 7708: 7298: 6738:Algebraic interior (core) 6353:Cauchy–Schwarz inequality 5996:Function space Topologies 5680:Topological Vector Spaces 5646:10.1007/978-94-015-7758-8 5636:Rolewicz, Stefan (1987), 4073:of a normed vector space 2640:{\displaystyle (X,\tau )} 2565:{\displaystyle (X,\tau )} 2283:{\displaystyle (X,\tau )} 2205:Moreover, there exists a 1284:{\displaystyle |\alpha |} 1184:{\displaystyle |\alpha |} 7960:Topological homomorphism 7820:Topological vector space 7547:Spectrum of a C*-algebra 5678:Schaefer, H. H. (1999). 5401:Topological vector space 4130:{\displaystyle \varphi } 4037:isometrically isomorphic 3142:topological vector space 2614:topological vector space 1894:if they define the same 1807:Of special interest are 1798:topological vector space 1556:in the following sense: 891:topological vector space 758:, then the ordered pair 7644:Noncommutative geometry 5141:{\displaystyle p\geq 1} 5049:which is a seminorm on 3639:, because its topology 2828:{\displaystyle 0\in X.} 2651:if there exists a norm 1028:seminormed vector space 292:, typically denoted by 160:is a vector space over 64:more precise citations. 8018:Absolutely convex/disk 7700:Tomita–Takesaki theory 7675:Approximation property 7619:Calculus of variations 7193: 7117: 7066: 7027: 6990: 6900: 6834: 6003:Banach–Mazur compactum 5793:Types of Banach spaces 5362:Banach–Mazur compactum 5336: 5316: 5260: 5176: 5142: 5113: 5086: 5066: 5043: 5007: 4929: 4901:Define a new function 4893: 4783: 4617: 4602: 4559: 4508: 4458: 4418: 4316: 4268: 4241: 4218: 4198: 4176: 4131: 4111: 4087: 4067: 4029: 4009: 3985: 3965: 3937: 3915: 3864: 3816: 3789: 3765: 3742: 3741:{\displaystyle \tau .} 3719: 3683: 3653: 3629: 3577: 3576:{\displaystyle \tau .} 3554: 3518: 3484: 3442: 3415: 3388: 3356: 3324: 3296: 3276: 3250:the strong dual space 3241: 3221: 3183: 3161: 3131: 3109: 3074: 3046: 2986: 2950: 2920: 2900: 2880: 2860: 2829: 2784: 2761: 2741: 2691: 2671: 2641: 2592: 2566: 2534: 2484: 2446: 2426: 2387: 2363: 2343: 2317: 2284: 2252: 2197: 2138: 2037: 1994: 1970: 1916: 1880: 1851: 1831: 1778: 1739: 1717: 1691: 1668: 1646: 1594: 1550: 1530: 1502: 1463: 1441: 1419: 1384: 1356: 1306: 1285: 1255: 1229: 1207: 1185: 1146: 1123: 1103: 986: 924:Euclidean vector space 879: 810: 790: 752: 732: 706: 683: 624: 623:{\displaystyle y\in V} 598: 597:{\displaystyle x\in V} 567: 512: 511:{\displaystyle x\in V} 486: 457: 437: 404: 403:{\displaystyle x\in V} 375: 342: 341:{\displaystyle x\in V} 312: 286: 258: 238: 216: 194: 174: 154: 109: 8053:Complemented subspace 7867:hyperplane separation 7695:Banach–Mazur distance 7658:Generalized functions 7219:Finite element method 7214:Differential operator 7194: 7118: 7067: 7028: 6991: 6901: 6835: 6675:Convex series related 6471:Abstract Wiener space 6398:hyperplane separation 5953:Minkowski functionals 5837:Polarization identity 5337: 5317: 5240: 5177: 5143: 5114: 5112:{\displaystyle q_{i}} 5087: 5067: 5044: 4987: 4930: 4894: 4784: 4618: 4582: 4560: 4509: 4459: 4440:Finite product spaces 4419: 4317: 4315:{\displaystyle L^{p}} 4269: 4242: 4219: 4199: 4177: 4132: 4112: 4088: 4068: 4030: 4010: 3993:isometric isomorphism 3986: 3966: 3938: 3916: 3865: 3817: 3790: 3766: 3743: 3720: 3684: 3654: 3652:{\displaystyle \tau } 3630: 3578: 3555: 3519: 3485: 3443: 3441:{\displaystyle \tau } 3416: 3389: 3357: 3325: 3297: 3277: 3242: 3222: 3184: 3162: 3132: 3110: 3075: 3047: 2987: 2951: 2921: 2901: 2881: 2861: 2830: 2785: 2762: 2760:{\displaystyle \tau } 2747:induces the topology 2742: 2692: 2672: 2642: 2593: 2567: 2535: 2485: 2447: 2427: 2388: 2386:{\displaystyle \tau } 2364: 2344: 2318: 2285: 2253: 2223:locally convex spaces 2198: 2139: 2038: 1995: 1971: 1917: 1881: 1852: 1832: 1802:topological structure 1779: 1740: 1718: 1692: 1669: 1647: 1595: 1551: 1531: 1503: 1464: 1442: 1420: 1385: 1357: 1318:Topological structure 1307: 1286: 1256: 1230: 1208: 1186: 1147: 1124: 1104: 987: 880: 826:(norm) induced metric 811: 791: 753: 733: 707: 684: 625: 599: 568: 513: 487: 458: 438: 405: 376: 343: 313: 287: 259: 239: 217: 195: 175: 155: 95: 8303:Locally convex space 7853:Closed graph theorem 7805:Locally convex space 7440:Kakutani fixed-point 7425:Riesz representation 7161: 7087: 7049: 7010: 6958: 6861: 6812: 6801:Absolute continuity 6455:Schauder fixed-point 6445:Riesz representation 6405:Kakutani fixed-point 6373:Freudenthal spectral 5859:L-semi-inner product 5750:at Wikimedia Commons 5423:Linear System Theory 5326: 5186: 5152: 5126: 5096: 5076: 5053: 4939: 4905: 4793: 4627: 4573: 4518: 4468: 4448: 4328: 4299: 4251: 4228: 4208: 4186: 4145: 4121: 4101: 4093:is the space of all 4077: 4050: 4019: 3999: 3975: 3955: 3925: 3874: 3854: 3803: 3779: 3755: 3750:locally convex space 3729: 3693: 3667: 3643: 3600: 3564: 3528: 3502: 3455: 3432: 3398: 3366: 3334: 3314: 3286: 3254: 3231: 3199: 3173: 3151: 3121: 3108:{\displaystyle X/C.} 3088: 3056: 2996: 2960: 2930: 2910: 2890: 2870: 2841: 2810: 2771: 2751: 2701: 2681: 2655: 2619: 2576: 2544: 2494: 2456: 2436: 2397: 2377: 2353: 2327: 2294: 2262: 2236: 2148: 2047: 2014: 2009:neighbourhood system 1984: 1930: 1906: 1867: 1841: 1821: 1749: 1727: 1705: 1678: 1656: 1611: 1564: 1560:The vector addition 1540: 1512: 1473: 1451: 1429: 1406: 1366: 1326: 1312:-adic absolute value 1296: 1265: 1243: 1217: 1195: 1165: 1133: 1113: 1047: 934: 833: 800: 762: 742: 716: 696: 634: 608: 582: 522: 496: 470: 447: 414: 388: 352: 326: 296: 268: 248: 226: 204: 200:is a field equal to 184: 164: 144: 98:inner product spaces 8283:Interpolation space 7815:Operator topologies 7624:Functional calculus 7583:Mahler's conjecture 7562:Von Neumann algebra 7276:Functional analysis 6884: 6622:measurable function 6572:Functional calculus 6435:Parseval's identity 6348:Bessel's inequality 6295:Polar decomposition 6074:Uniform convergence 5832:Inner product space 5562:Functional Analysis 5395:Space (mathematics) 5374:Inner product space 4276:Hahn–Banach theorem 3799:continuous norm on 3383: 3351: 3271: 3216: 3073:{\displaystyle X/C} 2804:von Neumann bounded 2219:functional analysis 2207:neighbourhood basis 1800:and thus carries a 1602:triangle inequality 1156:continuous function 1014:normed vector space 996:functional analysis 916:inner product space 576:Triangle inequality 463:is the zero vector. 136:numbers on which a 118:normed vector space 8313:(Pseudo)Metrizable 8145:Minkowski addition 7997:Sublinear function 7649:Riemann hypothesis 7348:Topological vector 7234:Validated numerics 7189: 7145:Sobolev inequality 7113: 7062: 7023: 6986: 6915:Bounded variation 6896: 6864: 6849:Banach coordinate 6830: 6768:Minkowski addition 6430:M. Riesz extension 5910:Banach spaces are: 5332: 5312: 5172: 5138: 5109: 5082: 5065:{\displaystyle X.} 5062: 5039: 4925: 4889: 4779: 4613: 4555: 4504: 4464:seminormed spaces 4454: 4414: 4312: 4264: 4240:{\displaystyle V.} 4237: 4214: 4194: 4172: 4137:is defined as the 4127: 4107: 4083: 4063: 4025: 4005: 3981: 3961: 3933: 3911: 3860: 3815:{\displaystyle X.} 3812: 3785: 3761: 3738: 3715: 3679: 3649: 3625: 3573: 3550: 3514: 3480: 3438: 3411: 3384: 3369: 3362:is normable (here 3352: 3337: 3320: 3292: 3272: 3257: 3237: 3217: 3202: 3179: 3157: 3127: 3105: 3070: 3042: 3026: 2982: 2946: 2916: 2896: 2876: 2856: 2825: 2783:{\displaystyle X.} 2780: 2757: 2737: 2687: 2667: 2637: 2588: 2562: 2530: 2480: 2442: 2422: 2383: 2359: 2339: 2313: 2280: 2248: 2193: 2134: 2033: 1990: 1966: 1912: 1879:{\displaystyle V.} 1876: 1857:and is called the 1847: 1827: 1786:pseudometric space 1774: 1735: 1713: 1690:{\displaystyle V,} 1687: 1664: 1642: 1590: 1546: 1526: 1498: 1459: 1437: 1418:{\displaystyle V.} 1415: 1398:) and therefore a 1380: 1352: 1302: 1281: 1251: 1225: 1203: 1181: 1145:{\displaystyle y.} 1142: 1119: 1099: 982: 928:Euclidean distance 875: 806: 786: 748: 728: 702: 679: 620: 594: 563: 508: 482: 453: 433: 400: 371: 338: 308: 282: 254: 234: 212: 190: 170: 150: 110: 106:topological spaces 8441: 8440: 8160:Relative interior 7906:Bilinear operator 7790:Linear functional 7726: 7725: 7629:Integral operator 7406: 7405: 7242: 7241: 6954:Morrey–Campanato 6936:compact Hausdorff 6783:Relative interior 6637:Absolutely convex 6604:Projection-valued 6213:Strictly singular 6139:on Hilbert spaces 5900:of Hilbert spaces 5746:Media related to 5719:978-0-486-45352-1 5689:978-1-4612-7155-0 5576:978-0-07-054236-5 5477:978-0-521-76879-5 5447:Kedlaya, Kiran S. 5335:{\displaystyle p} 5309: 5085:{\displaystyle q} 4457:{\displaystyle n} 4426:Lebesgue integral 4217:{\displaystyle 1} 4110:{\displaystyle V} 4097:linear maps from 4086:{\displaystyle V} 4028:{\displaystyle W} 4008:{\displaystyle V} 3984:{\displaystyle W} 3964:{\displaystyle V} 3863:{\displaystyle f} 3788:{\displaystyle X} 3764:{\displaystyle X} 3421:endowed with the 3323:{\displaystyle X} 3295:{\displaystyle X} 3240:{\displaystyle X} 3194:strong dual space 3182:{\displaystyle X} 3160:{\displaystyle X} 3130:{\displaystyle X} 3082:quotient topology 3080:that induces the 3011: 2919:{\displaystyle X} 2899:{\displaystyle C} 2879:{\displaystyle X} 2690:{\displaystyle X} 2445:{\displaystyle B} 2362:{\displaystyle X} 1993:{\displaystyle V} 1915:{\displaystyle V} 1850:{\displaystyle V} 1830:{\displaystyle V} 1549:{\displaystyle V} 1305:{\displaystyle p} 1122:{\displaystyle x} 974: 829:, by the formula 819:A norm induces a 809:{\displaystyle V} 751:{\displaystyle V} 705:{\displaystyle V} 456:{\displaystyle x} 257:{\displaystyle V} 244:, then a norm on 193:{\displaystyle K} 173:{\displaystyle K} 153:{\displaystyle V} 100:and a subset of 90: 89: 82: 16:(Redirected from 8461: 8431: 8430: 8405:Uniformly smooth 8074: 8066: 8033:Balanced/Circled 8023:Absorbing/Radial 7753: 7746: 7739: 7730: 7716: 7715: 7634:Jones polynomial 7552:Operator algebra 7296: 7269: 7262: 7255: 7246: 7198: 7196: 7195: 7190: 7185: 7184: 7152:Triebel–Lizorkin 7122: 7120: 7119: 7114: 7112: 7108: 7107: 7102: 7071: 7069: 7068: 7063: 7061: 7060: 7032: 7030: 7029: 7024: 7022: 7021: 6995: 6993: 6992: 6987: 6976: 6975: 6905: 6903: 6902: 6897: 6892: 6883: 6878: 6839: 6837: 6836: 6831: 6692: 6670: 6652:Balanced/Circled 6450:Robinson-Ursescu 6368:Eberlein–Šmulian 6288:Spectral theorem 6084:Linear operators 5881:Uniformly smooth 5778: 5771: 5764: 5755: 5745: 5731: 5706:Trèves, François 5701: 5674: 5632: 5630: 5629: 5623: 5617:. Archived from 5608: 5588: 5543: 5542: 5530: 5524: 5518: 5509: 5503: 5497: 5491: 5482: 5480: 5469: 5443: 5437: 5436: 5418: 5368:Finsler manifold 5341: 5339: 5338: 5333: 5321: 5319: 5318: 5313: 5311: 5310: 5302: 5300: 5296: 5295: 5294: 5289: 5285: 5284: 5270: 5269: 5259: 5254: 5230: 5226: 5225: 5224: 5206: 5205: 5181: 5179: 5178: 5173: 5171: 5147: 5145: 5144: 5139: 5118: 5116: 5115: 5110: 5108: 5107: 5091: 5089: 5088: 5083: 5071: 5069: 5068: 5063: 5048: 5046: 5045: 5040: 5035: 5031: 5030: 5017: 5016: 5006: 5001: 4983: 4979: 4978: 4977: 4959: 4958: 4934: 4932: 4931: 4926: 4924: 4898: 4896: 4895: 4890: 4885: 4881: 4880: 4879: 4858: 4857: 4837: 4833: 4832: 4831: 4813: 4812: 4788: 4786: 4785: 4780: 4778: 4774: 4773: 4772: 4760: 4759: 4741: 4740: 4728: 4727: 4710: 4706: 4705: 4704: 4686: 4685: 4668: 4664: 4663: 4662: 4644: 4643: 4622: 4620: 4619: 4614: 4612: 4611: 4601: 4596: 4564: 4562: 4561: 4556: 4551: 4543: 4542: 4530: 4529: 4513: 4511: 4510: 4505: 4503: 4499: 4498: 4497: 4485: 4484: 4463: 4461: 4460: 4455: 4434:Lebesgue measure 4423: 4421: 4420: 4415: 4413: 4412: 4408: 4399: 4395: 4387: 4386: 4381: 4363: 4346: 4345: 4321: 4319: 4318: 4313: 4311: 4310: 4273: 4271: 4270: 4265: 4263: 4262: 4246: 4244: 4243: 4238: 4223: 4221: 4220: 4215: 4203: 4201: 4200: 4195: 4193: 4181: 4179: 4178: 4173: 4171: 4163: 4152: 4136: 4134: 4133: 4128: 4116: 4114: 4113: 4108: 4092: 4090: 4089: 4084: 4072: 4070: 4069: 4064: 4062: 4061: 4034: 4032: 4031: 4026: 4014: 4012: 4011: 4006: 3990: 3988: 3987: 3982: 3970: 3968: 3967: 3962: 3942: 3940: 3939: 3934: 3932: 3921:for all vectors 3920: 3918: 3917: 3912: 3907: 3890: 3869: 3867: 3866: 3861: 3821: 3819: 3818: 3813: 3794: 3792: 3791: 3786: 3770: 3768: 3767: 3762: 3747: 3745: 3744: 3739: 3724: 3722: 3721: 3716: 3705: 3704: 3688: 3686: 3685: 3680: 3658: 3656: 3655: 3650: 3634: 3632: 3631: 3626: 3612: 3611: 3582: 3580: 3579: 3574: 3559: 3557: 3556: 3551: 3540: 3539: 3523: 3521: 3520: 3515: 3489: 3487: 3486: 3481: 3467: 3466: 3447: 3445: 3444: 3439: 3420: 3418: 3417: 3412: 3410: 3409: 3393: 3391: 3390: 3385: 3382: 3377: 3361: 3359: 3358: 3353: 3350: 3345: 3329: 3327: 3326: 3321: 3301: 3299: 3298: 3293: 3281: 3279: 3278: 3273: 3270: 3265: 3246: 3244: 3243: 3238: 3226: 3224: 3223: 3218: 3215: 3210: 3188: 3186: 3185: 3180: 3166: 3164: 3163: 3158: 3136: 3134: 3133: 3128: 3114: 3112: 3111: 3106: 3098: 3079: 3077: 3076: 3071: 3066: 3051: 3049: 3048: 3043: 3025: 2991: 2989: 2988: 2983: 2981: 2970: 2955: 2953: 2952: 2947: 2925: 2923: 2922: 2917: 2905: 2903: 2902: 2897: 2885: 2883: 2882: 2877: 2865: 2863: 2862: 2857: 2834: 2832: 2831: 2826: 2806:neighborhood of 2789: 2787: 2786: 2781: 2766: 2764: 2763: 2758: 2746: 2744: 2743: 2738: 2696: 2694: 2693: 2688: 2676: 2674: 2673: 2668: 2646: 2644: 2643: 2638: 2597: 2595: 2594: 2589: 2571: 2569: 2568: 2563: 2539: 2537: 2536: 2531: 2489: 2487: 2486: 2481: 2451: 2449: 2448: 2443: 2431: 2429: 2428: 2423: 2415: 2414: 2392: 2390: 2389: 2384: 2368: 2366: 2365: 2360: 2348: 2346: 2345: 2340: 2322: 2320: 2319: 2314: 2312: 2311: 2289: 2287: 2286: 2281: 2257: 2255: 2254: 2249: 2202: 2200: 2199: 2194: 2143: 2141: 2140: 2135: 2121: 2120: 2081: 2080: 2056: 2055: 2042: 2040: 2039: 2034: 2023: 2022: 1999: 1997: 1996: 1991: 1975: 1973: 1972: 1967: 1921: 1919: 1918: 1913: 1885: 1883: 1882: 1877: 1856: 1854: 1853: 1848: 1836: 1834: 1833: 1828: 1783: 1781: 1780: 1775: 1767: 1759: 1744: 1742: 1741: 1736: 1734: 1722: 1720: 1719: 1714: 1712: 1696: 1694: 1693: 1688: 1673: 1671: 1670: 1665: 1663: 1651: 1649: 1648: 1643: 1626: 1599: 1597: 1596: 1591: 1555: 1553: 1552: 1547: 1535: 1533: 1532: 1527: 1507: 1505: 1504: 1499: 1491: 1483: 1468: 1466: 1465: 1460: 1458: 1446: 1444: 1443: 1438: 1436: 1424: 1422: 1421: 1416: 1389: 1387: 1386: 1381: 1361: 1359: 1358: 1353: 1311: 1309: 1308: 1303: 1290: 1288: 1287: 1282: 1280: 1272: 1260: 1258: 1257: 1252: 1250: 1234: 1232: 1231: 1226: 1224: 1212: 1210: 1209: 1204: 1202: 1190: 1188: 1187: 1182: 1180: 1172: 1151: 1149: 1148: 1143: 1128: 1126: 1125: 1120: 1109:for any vectors 1108: 1106: 1105: 1100: 1098: 1072: 1030: 1029: 1020:equipped with a 1008:Seminormed space 991: 989: 988: 983: 975: 970: 962: 905:finite sequences 884: 882: 881: 876: 815: 813: 812: 807: 795: 793: 792: 787: 757: 755: 754: 749: 737: 735: 734: 729: 711: 709: 708: 703: 688: 686: 685: 680: 629: 627: 626: 621: 603: 601: 600: 595: 572: 570: 569: 564: 552: 544: 517: 515: 514: 509: 491: 489: 488: 483: 462: 460: 459: 454: 442: 440: 439: 434: 409: 407: 406: 401: 380: 378: 377: 372: 347: 345: 344: 339: 317: 315: 314: 309: 291: 289: 288: 283: 281: 263: 261: 260: 255: 243: 241: 240: 235: 233: 221: 219: 218: 213: 211: 199: 197: 196: 191: 179: 177: 176: 171: 159: 157: 156: 151: 85: 78: 74: 71: 65: 60:this article by 51:inline citations 38: 37: 30: 21: 8469: 8468: 8464: 8463: 8462: 8460: 8459: 8458: 8444: 8443: 8442: 8437: 8419: 8181:B-complete/Ptak 8164: 8108: 8072: 8064: 8043:Bounding points 8006: 7948:Densely defined 7894: 7883:Bounded inverse 7829: 7763: 7757: 7727: 7722: 7704: 7668:Advanced topics 7663: 7587: 7566: 7525: 7491:Hilbert–Schmidt 7464: 7455:Gelfand–Naimark 7402: 7352: 7287: 7273: 7243: 7238: 7202: 7176: 7159: 7158: 7157:Wiener amalgam 7127:Segal–Bargmann 7097: 7093: 7085: 7084: 7052: 7047: 7046: 7013: 7008: 7007: 6961: 6956: 6955: 6910:Birnbaum–Orlicz 6859: 6858: 6810: 6809: 6787: 6743:Bounding points 6716: 6690: 6668: 6625: 6476:Banach manifold 6459: 6383:Gelfand–Naimark 6304: 6278:Spectral theory 6246:Banach algebras 6238:Operator theory 6232: 6193:Pseudo-monotone 6176:Hilbert–Schmidt 6156:Densely defined 6078: 5991: 5905: 5788: 5782: 5738: 5720: 5704: 5690: 5677: 5656: 5635: 5627: 5625: 5621: 5606: 5591: 5577: 5555: 5552: 5547: 5546: 5536: 5531: 5527: 5519: 5512: 5504: 5500: 5492: 5485: 5481:, Theorem 1.3.6 5478: 5445: 5444: 5440: 5433: 5420: 5419: 5415: 5410: 5352: 5324: 5323: 5276: 5272: 5271: 5261: 5239: 5235: 5234: 5216: 5197: 5196: 5192: 5184: 5183: 5150: 5149: 5124: 5123: 5099: 5094: 5093: 5074: 5073: 5051: 5050: 5022: 5018: 5008: 4969: 4950: 4949: 4945: 4937: 4936: 4903: 4902: 4871: 4849: 4845: 4841: 4823: 4804: 4803: 4799: 4791: 4790: 4764: 4751: 4732: 4719: 4718: 4714: 4696: 4677: 4676: 4672: 4654: 4635: 4634: 4630: 4625: 4624: 4603: 4571: 4570: 4534: 4521: 4516: 4515: 4514:with seminorms 4489: 4476: 4475: 4471: 4466: 4465: 4446: 4445: 4442: 4376: 4355: 4351: 4350: 4337: 4326: 4325: 4302: 4297: 4296: 4284: 4254: 4249: 4248: 4226: 4225: 4206: 4205: 4184: 4183: 4143: 4142: 4119: 4118: 4099: 4098: 4075: 4074: 4053: 4048: 4047: 4017: 4016: 3997: 3996: 3973: 3972: 3953: 3952: 3923: 3922: 3872: 3871: 3852: 3851: 3827: 3801: 3800: 3777: 3776: 3753: 3752: 3727: 3726: 3696: 3691: 3690: 3665: 3664: 3641: 3640: 3603: 3598: 3597: 3562: 3561: 3531: 3526: 3525: 3500: 3499: 3458: 3453: 3452: 3430: 3429: 3423:weak-* topology 3401: 3396: 3395: 3364: 3363: 3332: 3331: 3312: 3311: 3284: 3283: 3252: 3251: 3229: 3228: 3197: 3196: 3171: 3170: 3149: 3148: 3137:is a Hausdorff 3119: 3118: 3086: 3085: 3054: 3053: 2994: 2993: 2958: 2957: 2928: 2927: 2908: 2907: 2888: 2887: 2868: 2867: 2839: 2838: 2808: 2807: 2769: 2768: 2749: 2748: 2699: 2698: 2679: 2678: 2653: 2652: 2617: 2616: 2610: 2604: 2602:Normable spaces 2574: 2573: 2542: 2541: 2492: 2491: 2490:(such as maybe 2454: 2453: 2434: 2433: 2400: 2395: 2394: 2375: 2374: 2351: 2350: 2325: 2324: 2297: 2292: 2291: 2260: 2259: 2234: 2233: 2146: 2145: 2045: 2044: 2012: 2011: 1982: 1981: 1928: 1927: 1924:locally compact 1904: 1903: 1865: 1864: 1839: 1838: 1819: 1818: 1747: 1746: 1725: 1724: 1703: 1702: 1676: 1675: 1654: 1653: 1609: 1608: 1562: 1561: 1538: 1537: 1510: 1509: 1471: 1470: 1449: 1448: 1427: 1426: 1404: 1403: 1364: 1363: 1324: 1323: 1320: 1294: 1293: 1263: 1262: 1261:one could take 1241: 1240: 1215: 1214: 1193: 1192: 1163: 1162: 1131: 1130: 1111: 1110: 1045: 1044: 1027: 1026: 1010: 1004: 963: 932: 931: 930:by the formula 831: 830: 798: 797: 760: 759: 740: 739: 714: 713: 694: 693: 632: 631: 606: 605: 580: 579: 520: 519: 494: 493: 468: 467: 445: 444: 443:if and only if 412: 411: 386: 385: 350: 349: 324: 323: 294: 293: 266: 265: 246: 245: 224: 223: 202: 201: 182: 181: 162: 161: 142: 141: 86: 75: 69: 66: 56:Please help to 55: 39: 35: 28: 23: 22: 15: 12: 11: 5: 8467: 8465: 8457: 8456: 8446: 8445: 8439: 8438: 8436: 8435: 8424: 8421: 8420: 8418: 8417: 8412: 8407: 8402: 8400:Ultrabarrelled 8392: 8386: 8381: 8375: 8370: 8365: 8360: 8355: 8350: 8341: 8335: 8330: 8328:Quasi-complete 8325: 8323:Quasibarrelled 8320: 8315: 8310: 8305: 8300: 8295: 8290: 8285: 8280: 8275: 8270: 8265: 8264: 8263: 8253: 8248: 8243: 8238: 8233: 8228: 8223: 8218: 8213: 8203: 8198: 8188: 8183: 8178: 8172: 8170: 8166: 8165: 8163: 8162: 8152: 8147: 8142: 8137: 8132: 8122: 8116: 8114: 8113:Set operations 8110: 8109: 8107: 8106: 8101: 8096: 8091: 8086: 8081: 8076: 8068: 8060: 8055: 8050: 8045: 8040: 8035: 8030: 8025: 8020: 8014: 8012: 8008: 8007: 8005: 8004: 7999: 7994: 7989: 7984: 7983: 7982: 7977: 7972: 7962: 7957: 7956: 7955: 7950: 7945: 7940: 7935: 7930: 7925: 7915: 7914: 7913: 7902: 7900: 7896: 7895: 7893: 7892: 7887: 7886: 7885: 7875: 7869: 7860: 7855: 7850: 7848:Banach–Alaoglu 7845: 7843:Anderson–Kadec 7839: 7837: 7831: 7830: 7828: 7827: 7822: 7817: 7812: 7807: 7802: 7797: 7792: 7787: 7782: 7777: 7771: 7769: 7768:Basic concepts 7765: 7764: 7758: 7756: 7755: 7748: 7741: 7733: 7724: 7723: 7721: 7720: 7709: 7706: 7705: 7703: 7702: 7697: 7692: 7687: 7685:Choquet theory 7682: 7677: 7671: 7669: 7665: 7664: 7662: 7661: 7651: 7646: 7641: 7636: 7631: 7626: 7621: 7616: 7611: 7606: 7601: 7595: 7593: 7589: 7588: 7586: 7585: 7580: 7574: 7572: 7568: 7567: 7565: 7564: 7559: 7554: 7549: 7544: 7539: 7537:Banach algebra 7533: 7531: 7527: 7526: 7524: 7523: 7518: 7513: 7508: 7503: 7498: 7493: 7488: 7483: 7478: 7472: 7470: 7466: 7465: 7463: 7462: 7460:Banach–Alaoglu 7457: 7452: 7447: 7442: 7437: 7432: 7427: 7422: 7416: 7414: 7408: 7407: 7404: 7403: 7401: 7400: 7395: 7390: 7388:Locally convex 7385: 7371: 7366: 7360: 7358: 7354: 7353: 7351: 7350: 7345: 7340: 7335: 7330: 7325: 7320: 7315: 7310: 7305: 7299: 7293: 7289: 7288: 7274: 7272: 7271: 7264: 7257: 7249: 7240: 7239: 7237: 7236: 7231: 7226: 7221: 7216: 7210: 7208: 7204: 7203: 7201: 7200: 7188: 7183: 7179: 7175: 7172: 7169: 7166: 7154: 7149: 7148: 7147: 7137: 7135:Sequence space 7132: 7124: 7111: 7106: 7101: 7096: 7092: 7080: 7079: 7078: 7073: 7059: 7055: 7036: 7035: 7034: 7020: 7016: 6997: 6985: 6982: 6979: 6974: 6971: 6968: 6964: 6951: 6943: 6938: 6925: 6920: 6912: 6907: 6895: 6891: 6887: 6882: 6877: 6874: 6871: 6867: 6854: 6846: 6841: 6829: 6826: 6823: 6820: 6817: 6806: 6797: 6795: 6789: 6788: 6786: 6785: 6775: 6770: 6765: 6760: 6755: 6750: 6745: 6740: 6730: 6724: 6722: 6718: 6717: 6715: 6714: 6709: 6704: 6699: 6694: 6686: 6672: 6664: 6659: 6654: 6649: 6644: 6639: 6633: 6631: 6627: 6626: 6624: 6623: 6613: 6612: 6611: 6606: 6601: 6591: 6590: 6589: 6584: 6579: 6569: 6568: 6567: 6562: 6557: 6552: 6550:Gelfand–Pettis 6547: 6542: 6532: 6531: 6530: 6525: 6520: 6515: 6510: 6500: 6495: 6490: 6485: 6484: 6483: 6473: 6467: 6465: 6461: 6460: 6458: 6457: 6452: 6447: 6442: 6437: 6432: 6427: 6422: 6417: 6412: 6407: 6402: 6401: 6400: 6390: 6385: 6380: 6375: 6370: 6365: 6360: 6355: 6350: 6345: 6340: 6335: 6330: 6325: 6323:Banach–Alaoglu 6320: 6318:Anderson–Kadec 6314: 6312: 6306: 6305: 6303: 6302: 6297: 6292: 6291: 6290: 6285: 6275: 6274: 6273: 6268: 6258: 6256:Operator space 6253: 6248: 6242: 6240: 6234: 6233: 6231: 6230: 6225: 6220: 6215: 6210: 6205: 6200: 6195: 6190: 6189: 6188: 6178: 6173: 6172: 6171: 6166: 6158: 6153: 6143: 6142: 6141: 6131: 6126: 6116: 6115: 6114: 6109: 6104: 6094: 6088: 6086: 6080: 6079: 6077: 6076: 6071: 6066: 6065: 6064: 6059: 6049: 6048: 6047: 6042: 6032: 6027: 6022: 6021: 6020: 6010: 6005: 5999: 5997: 5993: 5992: 5990: 5989: 5984: 5979: 5978: 5977: 5967: 5962: 5957: 5956: 5955: 5944:Locally convex 5941: 5940: 5939: 5929: 5924: 5919: 5913: 5911: 5907: 5906: 5904: 5903: 5896:Tensor product 5889: 5883: 5878: 5872: 5867: 5861: 5856: 5851: 5841: 5840: 5839: 5834: 5824: 5819: 5817:Banach lattice 5814: 5813: 5812: 5802: 5796: 5794: 5790: 5789: 5783: 5781: 5780: 5773: 5766: 5758: 5752: 5751: 5737: 5736:External links 5734: 5733: 5732: 5718: 5702: 5688: 5675: 5654: 5633: 5593:Banach, Stefan 5589: 5575: 5551: 5548: 5545: 5544: 5535:, p. 130. 5525: 5510: 5498: 5483: 5476: 5467:10.1.1.165.270 5438: 5431: 5412: 5411: 5409: 5406: 5405: 5404: 5398: 5392: 5386: 5380: 5371: 5365: 5359: 5351: 5348: 5331: 5308: 5305: 5299: 5293: 5288: 5283: 5279: 5275: 5268: 5264: 5258: 5253: 5250: 5247: 5243: 5238: 5233: 5229: 5223: 5219: 5215: 5212: 5209: 5204: 5200: 5195: 5191: 5170: 5166: 5163: 5160: 5157: 5137: 5134: 5131: 5106: 5102: 5081: 5061: 5058: 5038: 5034: 5029: 5025: 5021: 5015: 5011: 5005: 5000: 4997: 4994: 4990: 4986: 4982: 4976: 4972: 4968: 4965: 4962: 4957: 4953: 4948: 4944: 4923: 4919: 4916: 4913: 4910: 4888: 4884: 4878: 4874: 4870: 4867: 4864: 4861: 4856: 4852: 4848: 4844: 4840: 4836: 4830: 4826: 4822: 4819: 4816: 4811: 4807: 4802: 4798: 4777: 4771: 4767: 4763: 4758: 4754: 4750: 4747: 4744: 4739: 4735: 4731: 4726: 4722: 4717: 4713: 4709: 4703: 4699: 4695: 4692: 4689: 4684: 4680: 4675: 4671: 4667: 4661: 4657: 4653: 4650: 4647: 4642: 4638: 4633: 4610: 4606: 4600: 4595: 4592: 4589: 4585: 4581: 4578: 4554: 4550: 4546: 4541: 4537: 4533: 4528: 4524: 4502: 4496: 4492: 4488: 4483: 4479: 4474: 4453: 4441: 4438: 4411: 4407: 4403: 4398: 4394: 4391: 4385: 4380: 4375: 4372: 4369: 4366: 4362: 4358: 4354: 4349: 4344: 4340: 4336: 4333: 4309: 4305: 4292:quotient space 4283: 4280: 4261: 4257: 4236: 4233: 4213: 4192: 4170: 4166: 4162: 4158: 4155: 4151: 4126: 4106: 4082: 4060: 4056: 4024: 4004: 3980: 3960: 3931: 3910: 3906: 3902: 3899: 3896: 3893: 3889: 3885: 3882: 3879: 3859: 3826: 3823: 3811: 3808: 3798: 3784: 3774: 3760: 3737: 3734: 3714: 3711: 3708: 3703: 3699: 3678: 3675: 3672: 3662: 3648: 3624: 3621: 3618: 3615: 3610: 3606: 3592: 3587:normable space 3572: 3569: 3549: 3546: 3543: 3538: 3534: 3513: 3510: 3507: 3497: 3479: 3476: 3473: 3470: 3465: 3461: 3437: 3408: 3404: 3381: 3376: 3372: 3349: 3344: 3340: 3319: 3308: 3307: 3291: 3269: 3264: 3260: 3248: 3236: 3214: 3209: 3205: 3190: 3178: 3168: 3156: 3139:locally convex 3126: 3104: 3101: 3097: 3093: 3069: 3065: 3061: 3041: 3038: 3035: 3032: 3029: 3024: 3021: 3018: 3014: 3010: 3007: 3004: 3001: 2980: 2976: 2973: 2969: 2965: 2945: 2942: 2939: 2935: 2915: 2895: 2875: 2855: 2852: 2849: 2846: 2824: 2821: 2818: 2815: 2779: 2776: 2756: 2736: 2733: 2730: 2727: 2724: 2721: 2718: 2715: 2712: 2709: 2706: 2686: 2666: 2663: 2660: 2636: 2633: 2630: 2627: 2624: 2603: 2600: 2587: 2584: 2581: 2561: 2558: 2555: 2552: 2549: 2529: 2526: 2523: 2520: 2517: 2514: 2511: 2508: 2505: 2502: 2499: 2479: 2476: 2473: 2470: 2467: 2464: 2461: 2441: 2421: 2418: 2413: 2410: 2407: 2403: 2382: 2358: 2338: 2335: 2332: 2310: 2307: 2304: 2300: 2279: 2276: 2273: 2270: 2267: 2247: 2244: 2241: 2192: 2189: 2186: 2183: 2180: 2177: 2174: 2171: 2168: 2165: 2162: 2159: 2156: 2153: 2133: 2130: 2127: 2124: 2119: 2114: 2111: 2108: 2105: 2102: 2099: 2096: 2093: 2090: 2087: 2084: 2079: 2074: 2071: 2068: 2065: 2062: 2059: 2054: 2032: 2029: 2026: 2021: 1989: 1965: 1962: 1959: 1956: 1953: 1950: 1947: 1944: 1941: 1938: 1935: 1911: 1893: 1875: 1872: 1862: 1846: 1826: 1816: 1773: 1770: 1766: 1762: 1758: 1754: 1733: 1711: 1699: 1698: 1686: 1683: 1662: 1641: 1638: 1635: 1632: 1629: 1625: 1621: 1617: 1605: 1589: 1586: 1583: 1580: 1577: 1574: 1570: 1545: 1525: 1521: 1517: 1497: 1494: 1490: 1486: 1482: 1478: 1457: 1435: 1414: 1411: 1379: 1375: 1371: 1351: 1348: 1344: 1340: 1337: 1334: 1331: 1319: 1316: 1301: 1279: 1275: 1271: 1249: 1237:absolute value 1223: 1201: 1179: 1175: 1171: 1141: 1138: 1118: 1097: 1093: 1090: 1087: 1084: 1081: 1078: 1075: 1071: 1067: 1064: 1061: 1058: 1055: 1052: 1003: 1000: 981: 978: 973: 969: 966: 960: 957: 954: 951: 948: 945: 942: 939: 920:Euclidean norm 909:Euclidean norm 902: 874: 871: 868: 865: 862: 859: 856: 853: 850: 847: 844: 841: 838: 828: 805: 785: 782: 779: 776: 773: 770: 767: 747: 727: 724: 721: 701: 690: 689: 678: 675: 672: 669: 666: 663: 660: 657: 654: 651: 648: 645: 642: 639: 619: 616: 613: 593: 590: 587: 573: 562: 559: 556: 551: 547: 543: 539: 536: 533: 530: 527: 507: 504: 501: 481: 478: 475: 464: 452: 432: 429: 426: 423: 420: 399: 396: 393: 382: 370: 367: 364: 361: 358: 337: 334: 331: 307: 304: 301: 280: 276: 273: 253: 232: 210: 189: 169: 149: 88: 87: 42: 40: 33: 26: 24: 18:Normable space 14: 13: 10: 9: 6: 4: 3: 2: 8466: 8455: 8454:Normed spaces 8452: 8451: 8449: 8434: 8426: 8425: 8422: 8416: 8413: 8411: 8408: 8406: 8403: 8401: 8397: 8393: 8391:) convex 8390: 8387: 8385: 8382: 8380: 8376: 8374: 8371: 8369: 8366: 8364: 8363:Semi-complete 8361: 8359: 8356: 8354: 8351: 8349: 8345: 8342: 8340: 8336: 8334: 8331: 8329: 8326: 8324: 8321: 8319: 8316: 8314: 8311: 8309: 8306: 8304: 8301: 8299: 8296: 8294: 8291: 8289: 8286: 8284: 8281: 8279: 8278:Infrabarreled 8276: 8274: 8271: 8269: 8266: 8262: 8259: 8258: 8257: 8254: 8252: 8249: 8247: 8244: 8242: 8239: 8237: 8236:Distinguished 8234: 8232: 8229: 8227: 8224: 8222: 8219: 8217: 8214: 8212: 8208: 8204: 8202: 8199: 8197: 8193: 8189: 8187: 8184: 8182: 8179: 8177: 8174: 8173: 8171: 8169:Types of TVSs 8167: 8161: 8157: 8153: 8151: 8148: 8146: 8143: 8141: 8138: 8136: 8133: 8131: 8127: 8123: 8121: 8118: 8117: 8115: 8111: 8105: 8102: 8100: 8097: 8095: 8092: 8090: 8089:Prevalent/Shy 8087: 8085: 8082: 8080: 8079:Extreme point 8077: 8075: 8069: 8067: 8061: 8059: 8056: 8054: 8051: 8049: 8046: 8044: 8041: 8039: 8036: 8034: 8031: 8029: 8026: 8024: 8021: 8019: 8016: 8015: 8013: 8011:Types of sets 8009: 8003: 8000: 7998: 7995: 7993: 7990: 7988: 7985: 7981: 7978: 7976: 7973: 7971: 7968: 7967: 7966: 7963: 7961: 7958: 7954: 7953:Discontinuous 7951: 7949: 7946: 7944: 7941: 7939: 7936: 7934: 7931: 7929: 7926: 7924: 7921: 7920: 7919: 7916: 7912: 7909: 7908: 7907: 7904: 7903: 7901: 7897: 7891: 7888: 7884: 7881: 7880: 7879: 7876: 7873: 7870: 7868: 7864: 7861: 7859: 7856: 7854: 7851: 7849: 7846: 7844: 7841: 7840: 7838: 7836: 7832: 7826: 7823: 7821: 7818: 7816: 7813: 7811: 7810:Metrizability 7808: 7806: 7803: 7801: 7798: 7796: 7795:FrĂ©chet space 7793: 7791: 7788: 7786: 7783: 7781: 7778: 7776: 7773: 7772: 7770: 7766: 7761: 7754: 7749: 7747: 7742: 7740: 7735: 7734: 7731: 7719: 7711: 7710: 7707: 7701: 7698: 7696: 7693: 7691: 7690:Weak topology 7688: 7686: 7683: 7681: 7678: 7676: 7673: 7672: 7670: 7666: 7659: 7655: 7652: 7650: 7647: 7645: 7642: 7640: 7637: 7635: 7632: 7630: 7627: 7625: 7622: 7620: 7617: 7615: 7614:Index theorem 7612: 7610: 7607: 7605: 7602: 7600: 7597: 7596: 7594: 7590: 7584: 7581: 7579: 7576: 7575: 7573: 7571:Open problems 7569: 7563: 7560: 7558: 7555: 7553: 7550: 7548: 7545: 7543: 7540: 7538: 7535: 7534: 7532: 7528: 7522: 7519: 7517: 7514: 7512: 7509: 7507: 7504: 7502: 7499: 7497: 7494: 7492: 7489: 7487: 7484: 7482: 7479: 7477: 7474: 7473: 7471: 7467: 7461: 7458: 7456: 7453: 7451: 7448: 7446: 7443: 7441: 7438: 7436: 7433: 7431: 7428: 7426: 7423: 7421: 7418: 7417: 7415: 7413: 7409: 7399: 7396: 7394: 7391: 7389: 7386: 7383: 7379: 7375: 7372: 7370: 7367: 7365: 7362: 7361: 7359: 7355: 7349: 7346: 7344: 7341: 7339: 7336: 7334: 7331: 7329: 7326: 7324: 7321: 7319: 7316: 7314: 7311: 7309: 7306: 7304: 7301: 7300: 7297: 7294: 7290: 7285: 7281: 7277: 7270: 7265: 7263: 7258: 7256: 7251: 7250: 7247: 7235: 7232: 7230: 7227: 7225: 7222: 7220: 7217: 7215: 7212: 7211: 7209: 7205: 7199: 7181: 7177: 7173: 7170: 7164: 7155: 7153: 7150: 7146: 7143: 7142: 7141: 7138: 7136: 7133: 7131: 7130: 7125: 7123: 7109: 7104: 7094: 7090: 7081: 7077: 7074: 7072: 7053: 7044: 7043: 7042: 7041: 7037: 7033: 7014: 7005: 7004: 7003: 7002: 6998: 6996: 6972: 6969: 6966: 6962: 6952: 6950: 6949: 6944: 6942: 6939: 6937: 6935: 6931: 6926: 6924: 6921: 6919: 6918: 6913: 6911: 6908: 6906: 6880: 6875: 6872: 6869: 6865: 6855: 6853: 6852: 6847: 6845: 6842: 6840: 6818: 6815: 6807: 6805: 6804: 6799: 6798: 6796: 6794: 6790: 6784: 6780: 6776: 6774: 6771: 6769: 6766: 6764: 6761: 6759: 6756: 6754: 6753:Extreme point 6751: 6749: 6746: 6744: 6741: 6739: 6735: 6731: 6729: 6726: 6725: 6723: 6719: 6713: 6710: 6708: 6705: 6703: 6700: 6698: 6695: 6693: 6687: 6684: 6680: 6676: 6673: 6671: 6665: 6663: 6660: 6658: 6655: 6653: 6650: 6648: 6645: 6643: 6640: 6638: 6635: 6634: 6632: 6630:Types of sets 6628: 6621: 6617: 6614: 6610: 6607: 6605: 6602: 6600: 6597: 6596: 6595: 6592: 6588: 6585: 6583: 6580: 6578: 6575: 6574: 6573: 6570: 6566: 6563: 6561: 6558: 6556: 6553: 6551: 6548: 6546: 6543: 6541: 6538: 6537: 6536: 6533: 6529: 6526: 6524: 6521: 6519: 6516: 6514: 6511: 6509: 6506: 6505: 6504: 6501: 6499: 6496: 6494: 6493:Convex series 6491: 6489: 6488:Bochner space 6486: 6482: 6479: 6478: 6477: 6474: 6472: 6469: 6468: 6466: 6462: 6456: 6453: 6451: 6448: 6446: 6443: 6441: 6440:Riesz's lemma 6438: 6436: 6433: 6431: 6428: 6426: 6425:Mazur's lemma 6423: 6421: 6418: 6416: 6413: 6411: 6408: 6406: 6403: 6399: 6396: 6395: 6394: 6391: 6389: 6386: 6384: 6381: 6379: 6378:Gelfand–Mazur 6376: 6374: 6371: 6369: 6366: 6364: 6361: 6359: 6356: 6354: 6351: 6349: 6346: 6344: 6341: 6339: 6336: 6334: 6331: 6329: 6326: 6324: 6321: 6319: 6316: 6315: 6313: 6311: 6307: 6301: 6298: 6296: 6293: 6289: 6286: 6284: 6281: 6280: 6279: 6276: 6272: 6269: 6267: 6264: 6263: 6262: 6259: 6257: 6254: 6252: 6249: 6247: 6244: 6243: 6241: 6239: 6235: 6229: 6226: 6224: 6221: 6219: 6216: 6214: 6211: 6209: 6206: 6204: 6201: 6199: 6196: 6194: 6191: 6187: 6184: 6183: 6182: 6179: 6177: 6174: 6170: 6167: 6165: 6162: 6161: 6159: 6157: 6154: 6152: 6148: 6144: 6140: 6137: 6136: 6135: 6132: 6130: 6127: 6125: 6121: 6117: 6113: 6110: 6108: 6105: 6103: 6100: 6099: 6098: 6095: 6093: 6090: 6089: 6087: 6085: 6081: 6075: 6072: 6070: 6067: 6063: 6060: 6058: 6055: 6054: 6053: 6050: 6046: 6043: 6041: 6038: 6037: 6036: 6033: 6031: 6028: 6026: 6023: 6019: 6016: 6015: 6014: 6011: 6009: 6006: 6004: 6001: 6000: 5998: 5994: 5988: 5985: 5983: 5980: 5976: 5973: 5972: 5971: 5968: 5966: 5963: 5961: 5958: 5954: 5950: 5947: 5946: 5945: 5942: 5938: 5935: 5934: 5933: 5930: 5928: 5925: 5923: 5920: 5918: 5915: 5914: 5912: 5908: 5901: 5897: 5893: 5890: 5888: 5884: 5882: 5879: 5877:) convex 5876: 5873: 5871: 5868: 5866: 5862: 5860: 5857: 5855: 5852: 5850: 5846: 5842: 5838: 5835: 5833: 5830: 5829: 5828: 5825: 5823: 5822:Grothendieck 5820: 5818: 5815: 5811: 5808: 5807: 5806: 5803: 5801: 5798: 5797: 5795: 5791: 5786: 5779: 5774: 5772: 5767: 5765: 5760: 5759: 5756: 5749: 5748:Normed spaces 5744: 5740: 5739: 5735: 5729: 5725: 5721: 5715: 5711: 5707: 5703: 5699: 5695: 5691: 5685: 5681: 5676: 5673: 5669: 5665: 5661: 5657: 5655:90-277-2186-6 5651: 5647: 5643: 5639: 5634: 5624:on 2014-01-11 5620: 5616: 5612: 5604: 5600: 5599: 5594: 5590: 5586: 5582: 5578: 5572: 5568: 5564: 5563: 5558: 5557:Rudin, Walter 5554: 5553: 5549: 5540: 5534: 5529: 5526: 5522: 5517: 5515: 5511: 5508:, p. 42. 5507: 5506:Schaefer 1999 5502: 5499: 5496:, p. 41. 5495: 5494:Schaefer 1999 5490: 5488: 5484: 5479: 5473: 5468: 5463: 5459: 5455: 5451: 5448: 5442: 5439: 5434: 5432:0-387-97573-X 5428: 5424: 5417: 5414: 5407: 5402: 5399: 5396: 5393: 5390: 5387: 5384: 5381: 5379: 5378:inner product 5375: 5372: 5369: 5366: 5363: 5360: 5357: 5354: 5353: 5349: 5347: 5343: 5329: 5306: 5303: 5297: 5291: 5286: 5281: 5277: 5273: 5266: 5262: 5256: 5251: 5248: 5245: 5241: 5236: 5231: 5227: 5221: 5217: 5213: 5210: 5207: 5202: 5198: 5193: 5189: 5161: 5158: 5155: 5135: 5132: 5129: 5120: 5104: 5100: 5079: 5072:The function 5059: 5056: 5036: 5032: 5027: 5023: 5019: 5013: 5009: 5003: 4998: 4995: 4992: 4988: 4984: 4980: 4974: 4970: 4966: 4963: 4960: 4955: 4951: 4946: 4942: 4914: 4911: 4908: 4899: 4886: 4882: 4876: 4872: 4868: 4865: 4862: 4859: 4854: 4850: 4846: 4842: 4838: 4834: 4828: 4824: 4820: 4817: 4814: 4809: 4805: 4800: 4796: 4775: 4769: 4765: 4761: 4756: 4752: 4748: 4745: 4742: 4737: 4733: 4729: 4724: 4720: 4715: 4711: 4707: 4701: 4697: 4693: 4690: 4687: 4682: 4678: 4673: 4669: 4665: 4659: 4655: 4651: 4648: 4645: 4640: 4636: 4631: 4608: 4604: 4598: 4593: 4590: 4587: 4583: 4579: 4576: 4568: 4567:product space 4552: 4539: 4535: 4531: 4526: 4522: 4500: 4494: 4490: 4486: 4481: 4477: 4472: 4451: 4439: 4437: 4435: 4431: 4427: 4409: 4405: 4401: 4396: 4392: 4389: 4383: 4370: 4364: 4356: 4352: 4347: 4342: 4334: 4323: 4307: 4303: 4293: 4289: 4288:Banach spaces 4281: 4279: 4277: 4255: 4234: 4231: 4211: 4153: 4140: 4124: 4104: 4096: 4080: 4054: 4045: 4040: 4038: 4022: 4002: 3994: 3991:is called an 3978: 3958: 3950: 3946: 3897: 3880: 3857: 3849: 3844: 3841: 3839: 3835: 3832: 3824: 3822: 3809: 3806: 3796: 3782: 3772: 3758: 3751: 3735: 3732: 3709: 3697: 3673: 3660: 3646: 3638: 3622: 3616: 3604: 3596: 3595:FrĂ©chet space 3590: 3588: 3583: 3570: 3567: 3544: 3532: 3508: 3495: 3493: 3477: 3471: 3459: 3451: 3450:FrĂ©chet space 3435: 3428:The topology 3426: 3424: 3402: 3374: 3370: 3342: 3338: 3317: 3310:Furthermore, 3305: 3289: 3262: 3258: 3249: 3234: 3207: 3203: 3195: 3191: 3176: 3169: 3154: 3147: 3146: 3145: 3143: 3140: 3124: 3115: 3102: 3099: 3095: 3091: 3083: 3067: 3063: 3059: 3036: 3033: 3030: 3022: 3019: 3016: 3005: 3002: 2999: 2971: 2967: 2963: 2956:then the map 2940: 2937: 2913: 2893: 2873: 2850: 2844: 2835: 2822: 2819: 2816: 2813: 2805: 2801: 2800: 2795: 2793: 2777: 2774: 2754: 2731: 2728: 2725: 2713: 2710: 2707: 2684: 2661: 2650: 2631: 2628: 2625: 2615: 2609: 2601: 2599: 2585: 2582: 2579: 2556: 2553: 2550: 2524: 2521: 2515: 2509: 2506: 2503: 2500: 2471: 2465: 2462: 2439: 2419: 2416: 2408: 2401: 2380: 2372: 2356: 2333: 2305: 2298: 2274: 2271: 2268: 2242: 2231: 2226: 2224: 2220: 2216: 2212: 2208: 2203: 2190: 2184: 2181: 2178: 2175: 2172: 2169: 2166: 2160: 2157: 2154: 2151: 2125: 2112: 2109: 2106: 2103: 2100: 2097: 2091: 2085: 2072: 2069: 2066: 2060: 2027: 2010: 2005: 2003: 2002:Riesz's lemma 1987: 1979: 1960: 1957: 1951: 1945: 1942: 1936: 1933: 1925: 1909: 1899: 1897: 1892: 1889: 1886: 1873: 1870: 1861: 1858: 1844: 1824: 1815: 1814:Banach spaces 1812: 1810: 1805: 1803: 1799: 1795: 1791: 1787: 1771: 1760: 1684: 1681: 1639: 1636: 1630: 1627: 1619: 1615: 1606: 1603: 1587: 1581: 1578: 1575: 1572: 1568: 1559: 1558: 1557: 1543: 1519: 1495: 1484: 1412: 1409: 1401: 1397: 1394:(a notion of 1393: 1373: 1342: 1335: 1332: 1317: 1315: 1313: 1299: 1273: 1238: 1173: 1159: 1157: 1152: 1139: 1136: 1116: 1088: 1082: 1076: 1065: 1059: 1056: 1053: 1042: 1037: 1035: 1031: 1023: 1019: 1015: 1009: 1001: 999: 997: 992: 979: 971: 967: 964: 955: 949: 946: 943: 937: 929: 925: 921: 917: 912: 910: 906: 901: 898: 896: 892: 888: 872: 866: 863: 860: 854: 848: 845: 842: 836: 827: 824: 823:, called its 822: 817: 803: 777: 771: 768: 745: 738:is a norm on 722: 699: 676: 670: 664: 658: 652: 646: 643: 640: 617: 614: 611: 591: 588: 585: 577: 574: 557: 545: 537: 531: 528: 505: 502: 499: 479: 476: 473: 465: 450: 430: 427: 421: 397: 394: 391: 383: 368: 365: 359: 335: 332: 329: 321: 320: 319: 302: 271: 251: 187: 167: 147: 139: 135: 131: 127: 123: 119: 115: 107: 103: 102:metric spaces 99: 94: 84: 81: 73: 70:December 2019 63: 59: 53: 52: 46: 41: 32: 31: 19: 8339:Polynomially 8268:Grothendieck 8261:tame FrĂ©chet 8211:Bornological 8071:Linear cone 8063:Convex cone 8038:Banach disks 7980:Sesquilinear 7835:Main results 7825:Vector space 7780:Completeness 7775:Banach space 7680:Balanced set 7654:Distribution 7592:Applications 7445:Krein–Milman 7430:Closed graph 7207:Applications 7128: 7039: 7000: 6947: 6933: 6929: 6916: 6850: 6802: 6689:Linear cone 6682: 6678: 6667:Convex cone 6560:Paley–Wiener 6420:Mackey–Arens 6410:Krein–Milman 6363:Closed range 6358:Closed graph 6328:Banach–Mazur 6208:Self-adjoint 6112:sesquilinear 5845:Polynomially 5785:Banach space 5709: 5679: 5637: 5626:. Retrieved 5619:the original 5602: 5597: 5561: 5550:Bibliography 5533:Jarchow 1981 5528: 5501: 5453: 5450: 5441: 5422: 5416: 5356:Banach space 5344: 5182:defined by 5121: 4900: 4443: 4432:on a set of 4285: 4094: 4041: 4036: 3992: 3847: 3845: 3842: 3828: 3797:at least one 3584: 3427: 3309: 3247:is normable. 3167:is normable. 3116: 2836: 2797: 2796: 2648: 2611: 2227: 2204: 2006: 1900: 1887: 1806: 1700: 1469:is given by 1395: 1321: 1160: 1153: 1038: 1025: 1018:vector space 1013: 1011: 993: 913: 900:Banach space 887:metric space 818: 691: 578:: for every 126:vector space 122:normed space 121: 117: 111: 76: 67: 48: 8333:Quasinormed 8246:FK-AK space 8140:Linear span 8135:Convex hull 8120:Affine hull 7923:Almost open 7863:Hahn–Banach 7609:Heat kernel 7599:Hardy space 7506:Trace class 7420:Hahn–Banach 7382:Topological 6928:Continuous 6763:Linear span 6748:Convex hull 6728:Affine hull 6587:holomorphic 6523:holomorphic 6503:Derivatives 6393:Hahn–Banach 6333:Banach–Saks 6251:C*-algebras 6218:Trace class 6181:Functionals 6069:Ultrastrong 5982:Quasinormed 5521:Trèves 2006 5119:are norms. 4565:denote the 4247:This turns 4035:are called 3834:linear maps 2349:induces on 2228:A norm (or 2215:convex sets 1794:convergence 114:mathematics 62:introducing 8373:Stereotype 8231:(DF)-space 8226:Convenient 7965:Functional 7933:Continuous 7918:Linear map 7858:F. Riesz's 7800:Linear map 7542:C*-algebra 7357:Properties 6681:), and (Hw 6582:continuous 6518:functional 6266:C*-algebra 6151:Continuous 6013:Dual space 5987:Stereotype 5965:Metrizable 5892:Projective 5628:2020-07-11 5615:0005.20901 5408:References 4095:continuous 4044:dual space 3949:surjective 3831:continuous 3304:metrizable 2792:Kolmogorov 2647:is called 2606:See also: 2393:(meaning, 1891:equivalent 1860:completion 1790:continuity 1390:induces a 1291:to be the 1006:See also: 1002:Definition 45:references 8389:Uniformly 8348:Reflexive 8196:Barrelled 8192:Countably 8104:Symmetric 8002:Transpose 7516:Unbounded 7511:Transpose 7469:Operators 7398:Separable 7393:Reflexive 7378:Algebraic 7364:Barrelled 7140:Sobolev W 7083:Schwartz 7058:∞ 7019:∞ 7015:ℓ 6981:Ω 6967:λ 6825:Σ 6707:Symmetric 6642:Absorbing 6555:regulated 6535:Integrals 6388:Goldstine 6223:Transpose 6160:Fredholm 6030:Ultraweak 6018:Dual norm 5949:Seminorms 5917:Barrelled 5887:Injective 5875:Uniformly 5849:Reflexive 5728:853623322 5708:(2006) . 5698:840278135 5462:CiteSeerX 5242:∑ 5211:… 5165:→ 5133:≥ 4989:∑ 4964:… 4918:→ 4869:α 4863:… 4847:α 4818:… 4797:α 4746:… 4691:… 4649:… 4584:∏ 4545:→ 4430:supported 4357:∫ 4339:‖ 4332:‖ 4260:′ 4154:φ 4125:φ 4059:′ 3945:injective 3909:‖ 3901:‖ 3895:‖ 3878:‖ 3733:τ 3702:∞ 3677:‖ 3674:⋅ 3671:‖ 3647:τ 3609:∞ 3568:τ 3537:∞ 3512:‖ 3509:⋅ 3506:‖ 3464:∞ 3436:τ 3407:′ 3380:′ 3375:σ 3348:′ 3343:σ 3268:′ 3213:′ 3040:‖ 3028:‖ 3020:∈ 3009:↦ 2992:given by 2975:→ 2944:‖ 2938:⋅ 2934:‖ 2845:≠ 2817:∈ 2755:τ 2735:‖ 2729:− 2723:‖ 2720:↦ 2665:‖ 2662:⋅ 2659:‖ 2632:τ 2586:τ 2583:∈ 2557:τ 2519:‖ 2513:‖ 2504:∈ 2475:‖ 2472:⋅ 2469:‖ 2420:τ 2417:⊆ 2412:‖ 2409:⋅ 2406:‖ 2402:τ 2381:τ 2337:‖ 2334:⋅ 2331:‖ 2309:‖ 2306:⋅ 2303:‖ 2299:τ 2275:τ 2246:‖ 2243:⋅ 2240:‖ 2211:absorbing 2182:∈ 2113:∈ 1958:≤ 1955:‖ 1949:‖ 1769:‖ 1761:− 1753:‖ 1634:→ 1628:× 1616:⋅ 1585:→ 1579:× 1524:‖ 1520:⋅ 1516:‖ 1493:‖ 1485:− 1477:‖ 1378:‖ 1374:⋅ 1370:‖ 1347:‖ 1343:⋅ 1339:‖ 1274:α 1174:α 1092:‖ 1086:‖ 1083:− 1080:‖ 1074:‖ 1066:≥ 1063:‖ 1057:− 1051:‖ 1039:A useful 977:‖ 972:→ 959:‖ 870:‖ 864:− 858:‖ 781:‖ 778:⋅ 775:‖ 726:‖ 723:⋅ 720:‖ 674:‖ 668:‖ 662:‖ 656:‖ 653:≤ 650:‖ 638:‖ 615:∈ 589:∈ 561:‖ 555:‖ 546:λ 535:‖ 529:λ 526:‖ 503:∈ 477:∈ 474:λ 425:‖ 419:‖ 395:∈ 366:≥ 363:‖ 357:‖ 333:∈ 306:‖ 303:⋅ 300:‖ 275:→ 264:is a map 128:over the 8448:Category 8433:Category 8384:Strictly 8358:Schwartz 8298:LF-space 8293:LB-space 8251:FK-space 8221:Complete 8201:BK-space 8126:Relative 8073:(subset) 8065:(subset) 7992:Seminorm 7975:Bilinear 7718:Category 7530:Algebras 7412:Theorems 7369:Complete 7338:Schwartz 7284:glossary 7076:weighted 6946:Hilbert 6923:Bs space 6793:Examples 6758:Interior 6734:Relative 6712:Zonotope 6691:(subset) 6669:(subset) 6620:Strongly 6599:Lebesgue 6594:Measures 6464:Analysis 6310:Theorems 6261:Spectrum 6186:positive 6169:operator 6107:operator 6097:Bilinear 6062:operator 6045:operator 6025:Operator 5922:Complete 5870:Strictly 5672:13064804 5595:(1932). 5585:21163277 5559:(1991). 5449:(2010), 5350:See also 5148:the map 4139:supremum 3848:isometry 3838:category 3394:denotes 2649:normable 2230:seminorm 1896:topology 1809:complete 1400:topology 1396:distance 1034:seminorm 895:complete 821:distance 180:, where 8398:)  8346:)  8288:K-space 8273:Hilbert 8256:FrĂ©chet 8241:F-space 8216:Brauner 8209:)  8194:)  8176:Asplund 8158:)  8128:)  8048:Bounded 7943:Compact 7928:Bounded 7865: ( 7521:Unitary 7501:Nuclear 7486:Compact 7481:Bounded 7476:Adjoint 7450:Min–max 7343:Sobolev 7328:Nuclear 7318:Hilbert 7313:FrĂ©chet 7278: ( 6941:Hardy H 6844:c space 6781:)  6736:)  6657:Bounded 6545:Dunford 6540:Bochner 6513:Gateaux 6508:FrĂ©chet 6283:of ODEs 6228:Unitary 6203:Nuclear 6134:Compact 6124:Bounded 6092:Adjoint 5932:FrĂ©chet 5927:F-space 5898: ( 5894:)  5847:)  5827:Hilbert 5800:Asplund 5664:0920371 3448:of the 2371:coarser 1978:compact 134:complex 58:improve 8410:Webbed 8396:Quasi- 8318:Montel 8308:Mackey 8207:Ultra- 8186:Banach 8094:Radial 8058:Convex 8028:Affine 7970:Linear 7938:Closed 7762:(TVSs) 7496:Normal 7333:Orlicz 7323:Hölder 7303:Banach 7292:Spaces 7280:topics 6857:Besov 6697:Radial 6662:Convex 6647:Affine 6616:Weakly 6609:Vector 6481:bundle 6271:radius 6198:Normal 6164:kernel 6129:Closed 6052:Strong 5970:Normed 5960:Mackey 5805:Banach 5787:topics 5726:  5716:  5696:  5686:  5670:  5662:  5652:  5613:  5605:] 5583:  5573:  5474:  5464:  5429:  4444:Given 4322:spaces 4182:where 3995:, and 3591:single 1652:where 1392:metric 889:and a 222:or to 47:, but 8368:Smith 8353:Riesz 8344:Semi- 8156:Quasi 8150:Polar 7308:Besov 6932:with 6779:Quasi 6773:Polar 6577:Borel 6528:quasi 6057:polar 6040:polar 5854:Riesz 5622:(PDF) 5607:(PDF) 5601:[ 4224:) in 3773:norms 2373:than 2323:that 2144:with 1016:is a 922:of a 124:is a 7987:Norm 7911:form 7899:Maps 7656:(or 7374:Dual 6930:C(K) 6565:weak 6102:form 6035:Weak 6008:Dual 5975:norm 5937:tame 5810:list 5724:OCLC 5714:ISBN 5694:OCLC 5684:ISBN 5668:OCLC 5650:ISBN 5581:OCLC 5571:ISBN 5539:help 5472:ISBN 5427:ISBN 4015:and 3971:and 3947:. A 3192:the 2522:< 2213:and 1792:and 1723:and 1447:and 1129:and 1024:. A 1022:norm 604:and 492:and 138:norm 130:real 116:, a 6147:Dis 5642:doi 5611:Zbl 4935:by 4569:by 4141:of 3846:An 3775:on 3689:on 3661:not 3524:on 3496:not 3425:). 3302:is 3282:of 3227:of 3117:If 3084:on 3013:inf 2767:on 2677:on 2598:). 2452:in 2369:is 2225:. 1976:is 1922:is 1863:of 1745:as 1402:on 1322:If 1043:is 914:An 692:If 132:or 120:or 112:In 8450:: 7282:– 6917:BV 6851:BK 6803:AC 6685:)) 6618:/ 6120:Un 5722:. 5692:. 5666:, 5660:MR 5658:, 5648:, 5579:. 5569:. 5513:^ 5486:^ 5470:, 5460:, 5232::= 4985::= 4839::= 4712::= 4580::= 4278:. 3840:. 2794:: 2612:A 2232:) 2161::= 2092::= 1314:. 1158:. 1036:. 1012:A 816:. 410:, 8394:( 8379:B 8377:( 8337:( 8205:( 8190:( 8154:( 8124:( 7874:) 7752:e 7745:t 7738:v 7660:) 7384:) 7380:/ 7376:( 7286:) 7268:e 7261:t 7254:v 7187:) 7182:p 7178:L 7174:, 7171:X 7168:( 7165:W 7129:F 7110:) 7105:n 7100:R 7095:( 7091:S 7054:L 7040:L 7001:â„“ 6984:) 6978:( 6973:p 6970:, 6963:L 6948:H 6934:K 6894:) 6890:R 6886:( 6881:s 6876:q 6873:, 6870:p 6866:B 6828:) 6822:( 6819:a 6816:b 6777:( 6732:( 6683:x 6679:x 6149:) 6145:( 6122:) 6118:( 5951:/ 5902:) 5885:( 5865:B 5863:( 5843:( 5777:e 5770:t 5763:v 5730:. 5700:. 5644:: 5631:. 5587:. 5541:) 5452:p 5435:. 5330:p 5307:p 5304:1 5298:) 5292:p 5287:) 5282:i 5278:x 5274:( 5267:i 5263:q 5257:n 5252:1 5249:= 5246:i 5237:( 5228:) 5222:n 5218:x 5214:, 5208:, 5203:1 5199:x 5194:( 5190:q 5169:R 5162:X 5159:: 5156:q 5136:1 5130:p 5105:i 5101:q 5080:q 5060:. 5057:X 5037:, 5033:) 5028:i 5024:x 5020:( 5014:i 5010:q 5004:n 4999:1 4996:= 4993:i 4981:) 4975:n 4971:x 4967:, 4961:, 4956:1 4952:x 4947:( 4943:q 4922:R 4915:X 4912:: 4909:q 4887:. 4883:) 4877:n 4873:x 4866:, 4860:, 4855:1 4851:x 4843:( 4835:) 4829:n 4825:x 4821:, 4815:, 4810:1 4806:x 4801:( 4776:) 4770:n 4766:y 4762:+ 4757:n 4753:x 4749:, 4743:, 4738:1 4734:y 4730:+ 4725:1 4721:x 4716:( 4708:) 4702:n 4698:y 4694:, 4688:, 4683:1 4679:y 4674:( 4670:+ 4666:) 4660:n 4656:x 4652:, 4646:, 4641:1 4637:x 4632:( 4609:i 4605:X 4599:n 4594:1 4591:= 4588:i 4577:X 4553:, 4549:R 4540:i 4536:X 4532:: 4527:i 4523:q 4501:) 4495:i 4491:q 4487:, 4482:i 4478:X 4473:( 4452:n 4410:p 4406:/ 4402:1 4397:) 4393:x 4390:d 4384:p 4379:| 4374:) 4371:x 4368:( 4365:f 4361:| 4353:( 4348:= 4343:p 4335:f 4308:p 4304:L 4256:V 4235:. 4232:V 4212:1 4191:v 4169:| 4165:) 4161:v 4157:( 4150:| 4105:V 4081:V 4055:V 4023:W 4003:V 3979:W 3959:V 3930:v 3905:v 3898:= 3892:) 3888:v 3884:( 3881:f 3858:f 3810:. 3807:X 3783:X 3759:X 3736:. 3713:) 3710:K 3707:( 3698:C 3623:, 3620:) 3617:K 3614:( 3605:C 3571:. 3548:) 3545:K 3542:( 3533:C 3478:, 3475:) 3472:K 3469:( 3460:C 3403:X 3371:X 3339:X 3318:X 3306:. 3290:X 3263:b 3259:X 3235:X 3208:b 3204:X 3177:X 3155:X 3125:X 3103:. 3100:C 3096:/ 3092:X 3068:C 3064:/ 3060:X 3037:c 3034:+ 3031:x 3023:C 3017:c 3006:C 3003:+ 3000:x 2979:R 2972:C 2968:/ 2964:X 2941:, 2914:X 2894:C 2874:X 2854:} 2851:0 2848:{ 2823:. 2820:X 2814:0 2778:. 2775:X 2732:x 2726:y 2717:) 2714:y 2711:, 2708:x 2705:( 2685:X 2635:) 2629:, 2626:X 2623:( 2580:B 2560:) 2554:, 2551:X 2548:( 2528:} 2525:1 2516:x 2510:: 2507:X 2501:x 2498:{ 2478:) 2466:, 2463:X 2460:( 2440:B 2357:X 2278:) 2272:, 2269:X 2266:( 2191:. 2188:} 2185:N 2179:n 2176:: 2173:n 2170:+ 2167:x 2164:{ 2158:N 2155:+ 2152:x 2132:} 2129:) 2126:0 2123:( 2118:N 2110:N 2107:: 2104:N 2101:+ 2098:x 2095:{ 2089:) 2086:0 2083:( 2078:N 2073:+ 2070:x 2067:= 2064:) 2061:x 2058:( 2053:N 2031:) 2028:0 2025:( 2020:N 1988:V 1964:} 1961:1 1952:x 1946:: 1943:x 1940:{ 1937:= 1934:B 1910:V 1874:. 1871:V 1845:V 1825:V 1772:. 1765:v 1757:u 1732:v 1710:u 1685:, 1682:V 1661:K 1640:, 1637:V 1631:V 1624:K 1620:: 1604:. 1588:V 1582:V 1576:V 1573:: 1569:+ 1544:V 1496:. 1489:v 1481:u 1456:v 1434:u 1413:. 1410:V 1350:) 1336:, 1333:V 1330:( 1300:p 1278:| 1270:| 1248:Q 1222:C 1200:R 1178:| 1170:| 1140:. 1137:y 1117:x 1096:| 1089:y 1077:x 1070:| 1060:y 1054:x 980:. 968:B 965:A 956:= 953:) 950:B 947:, 944:A 941:( 938:d 873:. 867:x 861:y 855:= 852:) 849:y 846:, 843:x 840:( 837:d 804:V 784:) 772:, 769:V 766:( 746:V 700:V 677:. 671:y 665:+ 659:x 647:y 644:+ 641:x 630:, 618:V 612:y 592:V 586:x 558:x 550:| 542:| 538:= 532:x 518:, 506:V 500:x 480:K 451:x 431:0 428:= 422:x 398:V 392:x 381:. 369:0 360:x 348:, 336:V 330:x 279:R 272:V 252:V 231:C 209:R 188:K 168:K 148:V 108:. 83:) 77:( 72:) 68:( 54:. 20:)

Index

Normable space
references
inline citations
improve
introducing
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inner product spaces
metric spaces
topological spaces
mathematics
vector space
real
complex
norm
Triangle inequality
distance
(norm) induced metric
metric space
topological vector space
complete
Banach space
finite sequences
Euclidean norm
inner product space
Euclidean norm
Euclidean vector space
Euclidean distance
functional analysis
Seminormed space

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