Knowledge (XXG)

Composition of relations

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compare to division and produce quotients. Three quotients are exhibited here: left residual, right residual, and symmetric quotient. The left residual of two relations is defined presuming that they have the same domain (source), and the right residual presumes the same codomain (range, target). The
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of two logical matrices will be 1, then, only if the row and column multiplied have a corresponding 1. Thus the logical matrix of a composition of relations can be found by computing the matrix product of the matrices representing the factors of the composition. "Matrices constitute a method for
3644: 4035: 4758: 477: 5455:. The usual composition of two binary relations as defined here can be obtained by taking their join, leading to a ternary relation, followed by a projection that removes the middle component. For example, in the query language SQL there is the operation 3336: 2184:. The entries of these matrices are either zero or one, depending on whether the relation represented is false or true for the row and column corresponding to compared objects. Working with such matrices involves the Boolean arithmetic with 235: 4390: 4241: 3922: 3511: 5392: 4576: 4644: 1871: 348: 1467: 4449: 4314: 4651: 2881: 4149:{\displaystyle QR\subseteq S\quad {\text{ is equivalent to }}\quad Q^{\textsf {T}}{\bar {S}}\subseteq {\bar {R}}\quad {\text{ is equivalent to }}\quad {\bar {S}}R^{\textsf {T}}\subseteq {\bar {Q}}.} 1576: 3241: 3026: 2925: 1249: 5114: 3971: 1648: 2727: 4825: 2973: 517: 3734:
hence any two languages share a nation where they both are spoken (in fact: Switzerland). Vice versa, the question whether two given nations share a language can be answered using
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Verbally, one equivalence can be obtained from another: select the first or second factor and transpose it; then complement the other two relations and permute them.
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explicitly when necessary, depending whether the left or the right relation is the first one applied. A further variation encountered in computer science is the
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is used to denote the traditional (right) composition, while left composition is denoted by a fat semicolon. The unicode symbols are ⨾ and ⨟.
5888: 5630: 5533: 5505: 6425: 1407: 4753:{\displaystyle \operatorname {syq} (E,F)\mathrel {:=} {\overline {E^{\textsf {T}}{\bar {F}}}}\cap {\overline {{\bar {E}}^{\textsf {T}}F}}} 4395: 1088:, the morphisms are binary relations and the composition of morphisms is exactly composition of relations as defined above. The category 5677: 6561: 6420: 5916: 5703: 5568: 5653: 4160: 6415: 6638: 6051: 472:{\displaystyle R;S=\{(x,z)\in X\times Z:{\text{ there exists }}y\in Y{\text{ such that }}(x,y)\in R{\text{ and }}(y,z)\in S\}.} 6133: 6452: 6372: 5498: 6046: 1523: 6237: 6166: 5876: 6140: 6128: 6091: 6066: 6041: 5995: 5964: 6071: 6061: 6633: 6437: 5937: 5526: 2978: 2886: 1213: 5064: 3931: 1607: 6410: 6076: 5778: 5447: 4960: 2694: 1874: 6628: 5969: 4795: 2937: 785: 6590: 6573: 3864: 484: 2272: 790: 6502: 6118: 5812:
De Morgan indicated contraries by lower case, conversion as M, and inclusion with )), so his notation was
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is commonly used in algebra to signify multiplication, so too, it can signify relative multiplication.
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the text sequence from the operation sequence. The small circle was used in the introductory pages of
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indicates a compound relation: for a person to be an uncle, he must be the brother of a parent. In
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Just as composition of relations is a type of multiplication resulting in a product, so some
4385:{\displaystyle RX\subseteq S{\text{ implies }}R^{\textsf {T}}{\bar {S}}\subseteq {\bar {X}},} 4236:{\displaystyle LM\subseteq N{\text{ implies }}{\bar {N}}M^{\textsf {T}}\subseteq {\bar {L}}.} 2535: 6357: 6210: 4974: 2509: 1881: 1581: 1276: 1186: 1127: 1090: 956: 566: 2187: 2030: 1934: 1773: 6539: 6322: 6200: 6195: 6180: 6005: 5990: 5868: 5696: 5657: 5584: 5561: 4503: 3828: 3804: 2164: 866: 734: 722: 88: 35: 6096: 4159:
Though this transformation of an inclusion of a composition of relations was detailed by
3917:{\displaystyle A\subseteq B{\text{ implies }}B^{\complement }\subseteq A^{\complement }.} 3104: 2564: 322: 146: 120: 94: 5650: 3783: 3714: 3649: 3238:, assuming rows (top to bottom) and columns (left to right) are ordered alphabetically: 3154: 3061: 3038: 2057: 1961: 6457: 6442: 6432: 6291: 6269: 6247: 5880: 5603: 5592: 5399: 5287: 5267: 4476: 4456: 4248: 3978: 3810: 3412: 3235: 3217: 3197: 3177: 3130: 3084: 2785: 2590: 2486: 2434: 2347: 2327: 2307: 2249: 2181: 2146: 2122: 2102: 2082: 2006: 1986: 1910: 1890: 1503: 1475: 1383: 1363: 895:
Further with the circle notation, subscripts may be used. Some authors prefer to write
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with the notation for function composition used (mostly by computer scientists) in
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is the special case of composition of relations where all relations involved are
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contains a 1 at every position, while the reversed matrix product computes as:
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With Schröder rules and complementation one can solve for an unknown relation
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Monoids, Acts and Categories with Applications to Wreath Products and Graphs
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the conclusions traditionally drawn by means of hypothetical syllogisms and
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has been subsumed by relational logical expressions and their composition.
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symmetric quotient presumes two relations share a domain and a codomain.
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A. De Morgan (1860) "On the Syllogism: IV and on the Logic of Relations"
4639:{\displaystyle D/C\mathrel {:=} {\overline {{\bar {D}}C^{\textsf {T}}}}} 1866:{\displaystyle (R\,;S)^{\textsf {T}}=S^{\textsf {T}}\,;R^{\textsf {T}}.} 4167:
first articulated the transformation as Theorem K in 1860. He wrote
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until it was dropped in favor of juxtaposition (no infix notation).
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of relations. However, the small circle is widely used to represent
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has been used for the infix notation of composition of relations by
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Another form of composition of relations, which applies to general
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understood as relations, meaning that there are converse relations
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This matrix is symmetric, and represents a homogeneous relation on
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Bjarni JĂłnssen (1984) "Maximal Algebras of Binary Relations", in
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it is common to represent the complement of a set by an overbar:
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is used to distinguish relations of Ferrer's type, which satisfy
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is surjective, which conversely implies only the surjectivity of
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is injective, which conversely implies only the injectivity of
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This property makes the set of all binary relations on a set a
5525:, Encyclopedia of Mathematics and its Applications, vol. 132, 1884:(that is, functional relations) is again a (partial) function. 2876:{\displaystyle R^{\textsf {T}}R\supseteq I=\{(x,x):x\in B\}.} 2139:) together with (left or right) relation composition forms a 5476: â€“ Human contact that exists because of a mutual friend 4808: 4524: 4925:
and the right residual is the greatest relation satisfying
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Thus the left residual is the greatest relation satisfying
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are distinct sets. Then using composition of relation
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has renewed the use of the semicolon, particularly in
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The category of linear relations over the 1244:{\displaystyle {\mathsf {Rel}}(\mathbb {X} )} 8: 5109:{\displaystyle c\,(<)\,d:H\to A\times B.} 3966:{\displaystyle {\bar {A}}=A^{\complement }.} 3058:{ France, Germany, Italy, Switzerland } and 2867: 2837: 2766: 2736: 1643:{\displaystyle R\subseteq k^{n}\oplus k^{m}} 463: 364: 2722:{\displaystyle I\subseteq RR^{\textsf {T}}} 2180:Finite binary relations are represented by 717:for composition of relations dates back to 6596:Positive cone of a partially ordered group 5945: 5931: 5923: 5625:. Cambridge University Press. p. 24. 4997:has been introduced to fuse two relations 1094:of sets and functions is a subcategory of 5903:M. Kilp, U. Knauer, A.V. Mikhalev (2000) 5826: 5817: 5421: 5401: 5375: 5374: 5373: 5351: 5350: 5349: 5331: 5324: 5314: 5309: 5289: 5269: 5237: 5236: 5235: 5229: 5208: 5207: 5206: 5200: 5159: 5121: 5081: 5071: 5066: 5034: 5002: 4976: 4930: 4904: 4893: 4864: 4832: 4820:{\displaystyle X\subseteq A\backslash B.} 4797: 4768: 4735: 4734: 4733: 4722: 4721: 4717: 4697: 4696: 4690: 4689: 4688: 4681: 4676: 4653: 4624: 4623: 4622: 4607: 4606: 4603: 4598: 4590: 4585: 4551: 4550: 4544: 4543: 4542: 4535: 4530: 4519: 4478: 4458: 4421: 4420: 4414: 4413: 4412: 4405: 4397: 4368: 4367: 4353: 4352: 4346: 4345: 4344: 4335: 4321: 4285: 4270: 4250: 4219: 4218: 4209: 4208: 4207: 4192: 4191: 4186: 4172: 4132: 4131: 4122: 4121: 4120: 4105: 4104: 4098: 4086: 4085: 4071: 4070: 4064: 4063: 4062: 4052: 4037: 4008: 4007: 4006: 4000: 3980: 3954: 3936: 3935: 3933: 3905: 3892: 3883: 3872: 3839: 3812: 3785: 3754: 3753: 3752: 3744: 3739: 3716: 3690: 3684: 3683: 3682: 3676: 3651: 3533: 3524: 3523: 3522: 3513: 3489: 3488: 3487: 3481: 3455: 3427: 3426: 3425: 3419: 3389: 3388: 3387: 3381: 3356: 3355: 3354: 3348: 3245: 3243: 3219: 3199: 3179: 3156: 3132: 3106: 3086: 3063: 3040: 3000: 2999: 2998: 2987: 2986: 2980: 2968:{\displaystyle {\bar {R}}^{\textsf {T}}R} 2956: 2955: 2954: 2943: 2942: 2939: 2905: 2904: 2903: 2888: 2819: 2818: 2817: 2811: 2787: 2734: 2713: 2712: 2711: 2696: 2671: 2670: 2669: 2660: 2636: 2635: 2634: 2616: 2592: 2566: 2537: 2511: 2488: 2464: 2463: 2462: 2456: 2436: 2415: 2414: 2413: 2404: 2380: 2379: 2378: 2372: 2349: 2329: 2309: 2274: 2221: 2189: 2148: 2124: 2104: 2084: 2059: 2037: 2032: 2008: 1988: 1963: 1941: 1936: 1912: 1892: 1854: 1853: 1852: 1844: 1838: 1837: 1836: 1823: 1822: 1821: 1810: 1802: 1780: 1775: 1704: 1666: 1662: 1661: 1658: 1634: 1621: 1609: 1583: 1544: 1543: 1528: 1527: 1525: 1505: 1496:), the category of relations internal to 1477: 1447: 1446: 1428: 1427: 1412: 1411: 1409: 1385: 1365: 1339: 1338: 1336: 1304: 1278: 1259: 1258: 1256: 1234: 1233: 1218: 1217: 1215: 1196: 1195: 1193: 1155: 1129: 1102: 1101: 1099: 1056: 1055: 1053: 1018: 986: 958: 933: 927: 906: 900: 868: 792: 749: 668: 630: 611: 607: 603: 599: 594: 568: 524: 486: 437: 411: 397: 350: 324: 292: 260: 210: 189: 174: 148: 122: 96: 64:, the composition of relations is called 6579:Positive cone of an ordered vector space 5798:The Origins of the Calculus of Relations 5649:Michael Barr & Charles Wells (1998) 5116:The construction depends on projections 42:is the forming of a new binary relation 5651:Category Theory for Computer Scientists 5486: 1400:. Categories of internal relations are 243:, the traditional form of reasoning by 91:it is said that the relation of Uncle ( 5580: 5578: 5576: 5517: 5515: 5513: 1682:is isomorphic to the phase-free qubit 1551: 1548: 1545: 1535: 1532: 1529: 1454: 1451: 1448: 1435: 1432: 1429: 1419: 1416: 1413: 1225: 1222: 1219: 1109: 1106: 1103: 1063: 1060: 1057: 512:{\displaystyle R;S\subseteq X\times Z} 5552: 5550: 2297:{\displaystyle R\subseteq A\times B;} 2143:with zero, where the identity map on 2079:The set of binary relations on a set 1210:, its category of internal relations 845:{\displaystyle g(f(x))=(g\circ f)(x)} 7: 5622:Practical Foundations of Mathematics 3766:{\displaystyle R\,;R^{\textsf {T}}.} 2927:The opposite inclusion occurs for a 2648:{\displaystyle x,xRR^{\textsf {T}}x} 1324:{\displaystyle R\subseteq X\times Y} 1006:{\displaystyle R\subseteq X\times Y} 312:{\displaystyle S\subseteq Y\times Z} 280:{\displaystyle R\subseteq X\times Y} 5678:Stanford Encyclopedia of Philosophy 3700:{\displaystyle R^{\textsf {T}}\,;R} 563:if and only if there is an element 6106:Properties & Types ( 2269:Consider a heterogeneous relation 25: 6562:Positive cone of an ordered field 5714:Kilp, Knauer & Mikhalev, p. 7 5188:{\displaystyle b:A\times B\to B,} 4967:Join: another form of composition 3446:when summation is implemented by 3404:{\displaystyle R^{\textsf {T}};R} 2775:{\displaystyle \{(x,x):x\in A\}.} 2729:where I is the identity relation 519:is defined by the rule that says 6416:Ordered topological vector space 5693:Fundamentals of Semigroup Theory 5249:{\displaystyle b^{\textsf {T}}.} 5147:{\displaystyle a:A\times B\to A} 4265:in relation inclusions such as 3501:{\displaystyle R^{\textsf {T}}R} 3439:{\displaystyle R^{\textsf {T}}R} 2680:{\displaystyle RR^{\textsf {T}}} 2476:{\displaystyle R^{\textsf {T}}R} 2424:{\displaystyle RR^{\textsf {T}}} 2399:there are homogeneous relations 2392:{\displaystyle R^{\textsf {T}},} 2176:Composition in terms of matrices 1757:{\displaystyle R;(S;T)=(R;S);T.} 1675:{\displaystyle \mathbb {F} _{2}} 52:from two given binary relations 5217:{\displaystyle a^{\textsf {T}}} 4918:{\displaystyle Y\subseteq D/C,} 4316:For instance, by Schröder rule 4290: 4284: 4103: 4097: 4057: 4051: 4017:{\displaystyle S^{\textsf {T}}} 3376:, and the relation composition 3365:{\displaystyle R^{\textsf {T}}} 1117:{\displaystyle {\mathsf {Rel}}} 1071:{\displaystyle {\mathsf {Rel}}} 194: 188: 5838: 5835: 5695:, page 16, LMS Monograph #12, 5672:Rick Nouwen and others (2016) 5608:Algebra und Logik der Relative 5587:& Thomas Ströhlein (1993) 5321: 5315: 5176: 5138: 5091: 5078: 5072: 5045: 5013: 4984: 4978: 4950:{\displaystyle YC\subseteq D.} 4852:{\displaystyle AX\subseteq B.} 4727: 4702: 4673: 4661: 4612: 4556: 4426: 4373: 4358: 4224: 4197: 4137: 4110: 4091: 4076: 4032:. Then the Schröder rules are 3941: 3847: 3841: 2992: 2948: 2852: 2840: 2751: 2739: 1818: 1804: 1742: 1730: 1724: 1712: 1588: 1565: 1562: 1556: 1540: 1440: 1424: 1283: 1238: 1230: 1166: 1134: 1029: 879: 870: 839: 833: 830: 818: 812: 809: 803: 797: 763: 751: 682: 670: 644: 632: 538: 526: 454: 442: 428: 416: 379: 367: 1: 6373:Series-parallel partial order 5853:{\displaystyle nM^{-1}))\ l.} 5499:American Mathematical Society 5495:Contributions to Group Theory 4881:{\displaystyle YC\subseteq D} 4785:{\displaystyle AX\subseteq B} 3856:{\displaystyle (\subseteq ).} 729:(2011). The use of semicolon 618:{\displaystyle x\,R\,y\,S\,z} 191: is equivalent to:  68:, and its result is called a 6052:Cantor's isomorphism theorem 5877:Lecture Notes in Mathematics 5723:ISO/IEC 13568:2002(E), p. 23 4745: 4709: 4631: 4563: 4433: 4100: is equivalent to  4054: is equivalent to  2241:{\displaystyle 1\times 1=1.} 1695:Composition of relations is 1346:{\displaystyle \mathbb {X} } 1266:{\displaystyle \mathbb {X} } 1203:{\displaystyle \mathbb {X} } 977:Mathematical generalizations 556:{\displaystyle (x,z)\in R;S} 6092:Szpilrajn extension theorem 6067:Hausdorff maximal principle 6042:Boolean prime ideal theorem 5871:and Michael Winter (2018): 2167:, and the empty set is the 6655: 6438:Topological vector lattice 5527:Cambridge University Press 4392:and complementation gives 3995:is a binary relation, let 1273:, but now the morphisms 942:{\displaystyle \circ _{r}} 915:{\displaystyle \circ _{l}} 769:{\displaystyle (R\circ S)} 694:{\displaystyle (y,z)\in S} 656:{\displaystyle (x,y)\in R} 212: if and only if  5960: 5779:Journal of Symbolic Logic 5556:Daniel D. Merrill (1990) 4859:Similarly, the inclusion 3469:{\displaystyle 3\times 3} 2099:(that is, relations from 1875:semigroup with involution 1251:has the same objects as 780:in his books considering 6047:Cantor–Bernstein theorem 5438:{\displaystyle n\geq 2,} 5054:{\displaystyle d:H\to B} 5022:{\displaystyle c:H\to A} 4763:Using Schröder's rules, 3450:. It turns out that the 3234:can be represented by a 1299:are given by subobjects 1175:{\displaystyle f:X\to Y} 1038:{\displaystyle R:X\to Y} 786:composition of functions 399: there exists  143:) and "is a parent of" ( 40:composition of relations 6591:Partially ordered group 6411:Specialization preorder 5521:Gunther Schmidt (2011) 2554:{\displaystyle y\in B,} 2265:Heterogeneous relations 1353:. Formally, these are 66:relative multiplication 6639:Mathematical relations 6077:Kruskal's tree theorem 6072:Knaster–Tarski theorem 6062:Dushnik–Miller theorem 5854: 5523:Relational Mathematics 5439: 5410: 5388: 5298: 5278: 5250: 5218: 5189: 5148: 5110: 5055: 5023: 4991: 4990:{\displaystyle (<)} 4951: 4919: 4882: 4853: 4821: 4786: 4754: 4640: 4572: 4487: 4467: 4445: 4386: 4310: 4259: 4237: 4150: 4018: 3989: 3967: 3918: 3857: 3821: 3803:the collection of all 3797: 3767: 3728: 3701: 3663: 3640: 3502: 3470: 3440: 3405: 3366: 3332: 3228: 3208: 3188: 3168: 3141: 3121: 3095: 3075: 3052: 3022: 2969: 2921: 2877: 2796: 2776: 2723: 2681: 2649: 2601: 2581: 2555: 2526: 2525:{\displaystyle x\in A} 2497: 2477: 2445: 2425: 2393: 2358: 2338: 2318: 2298: 2242: 2210: 2157: 2133: 2113: 2093: 2071: 2048: 2017: 1997: 1975: 1952: 1921: 1901: 1867: 1791: 1758: 1676: 1644: 1598: 1597:{\displaystyle n\to m} 1572: 1514: 1494:principal ideal domain 1486: 1463: 1394: 1374: 1347: 1325: 1293: 1292:{\displaystyle X\to Y} 1267: 1245: 1204: 1176: 1144: 1143:{\displaystyle X\to Y} 1118: 1072: 1039: 1007: 967: 966:{\displaystyle \circ } 943: 916: 886: 846: 770: 727:Relational Mathematics 695: 657: 619: 583: 582:{\displaystyle y\in Y} 557: 513: 473: 339: 313: 281: 231: 163: 137: 111: 27:Mathematical operation 5855: 5785:, quote from page 203 5440: 5416:-place relations for 5411: 5389: 5299: 5279: 5251: 5219: 5190: 5149: 5111: 5056: 5024: 4992: 4952: 4920: 4883: 4854: 4822: 4787: 4755: 4641: 4573: 4488: 4468: 4446: 4387: 4311: 4260: 4238: 4151: 4019: 3990: 3968: 3926:calculus of relations 3919: 3858: 3822: 3798: 3768: 3729: 3702: 3664: 3641: 3503: 3471: 3441: 3406: 3367: 3333: 3229: 3209: 3189: 3169: 3142: 3122: 3096: 3076: 3053: 3023: 2970: 2922: 2878: 2797: 2777: 2724: 2682: 2650: 2609:(left-)total relation 2602: 2582: 2556: 2527: 2498: 2478: 2446: 2426: 2394: 2359: 2339: 2319: 2299: 2243: 2211: 2209:{\displaystyle 1+1=1} 2158: 2134: 2114: 2094: 2072: 2049: 2047:{\displaystyle R\,;S} 2018: 1998: 1976: 1953: 1951:{\displaystyle R\,;S} 1922: 1902: 1868: 1792: 1790:{\displaystyle R\,;S} 1759: 1677: 1645: 1599: 1573: 1515: 1492:(or more generally a 1487: 1464: 1395: 1375: 1348: 1326: 1294: 1268: 1246: 1205: 1177: 1145: 1119: 1073: 1040: 1008: 968: 944: 917: 887: 847: 771: 721:'s textbook of 1895. 705:Notational variations 696: 658: 620: 584: 558: 514: 474: 413: such that  340: 314: 282: 232: 164: 138: 112: 62:calculus of relations 6569:Ordered vector space 5816: 5751:"internal relations" 5619:Paul Taylor (1999). 5589:Relations and Graphs 5497:, K.I. Appel editor 5420: 5400: 5308: 5288: 5268: 5228: 5199: 5158: 5120: 5065: 5033: 5001: 4975: 4929: 4892: 4863: 4831: 4796: 4767: 4652: 4648:Symmetric quotient: 4584: 4518: 4477: 4457: 4451:which is called the 4396: 4320: 4269: 4249: 4171: 4036: 3999: 3979: 3932: 3871: 3867:reverses inclusion: 3838: 3811: 3784: 3738: 3715: 3675: 3650: 3512: 3480: 3454: 3418: 3380: 3347: 3242: 3218: 3198: 3178: 3155: 3131: 3105: 3085: 3062: 3039: 2979: 2938: 2887: 2810: 2786: 2733: 2695: 2659: 2615: 2591: 2565: 2536: 2510: 2487: 2455: 2435: 2403: 2371: 2348: 2328: 2308: 2273: 2220: 2188: 2147: 2123: 2103: 2083: 2058: 2031: 2007: 1987: 1962: 1935: 1911: 1891: 1801: 1774: 1703: 1657: 1608: 1582: 1524: 1504: 1476: 1408: 1384: 1364: 1335: 1303: 1277: 1255: 1214: 1192: 1154: 1128: 1098: 1052: 1017: 985: 957: 926: 899: 885:{\displaystyle (RS)} 867: 858:Graphs and Relations 791: 748: 667: 629: 593: 567: 523: 485: 349: 323: 291: 259: 173: 147: 121: 95: 74:Function composition 18:Relation composition 6407:Alexandrov topology 6353:Lexicographic order 6312:Well-quasi-ordering 5873:Relational Topology 5802:Stanford University 5469:Demonic composition 4337: implies  4188: implies  3885: implies  3448:logical disjunction 3411:corresponds to the 3372:corresponds to the 3120:{\displaystyle aRb} 2804:surjective relation 2580:{\displaystyle xRy} 1882:(partial) functions 1880:The composition of 338:{\displaystyle R;S} 162:{\displaystyle yPz} 136:{\displaystyle xBy} 110:{\displaystyle xUz} 6388:Transitive closure 6348:Converse/Transpose 6057:Dilworth's theorem 5850: 5740:on FileFormat.info 5656:2016-03-04 at the 5474:Friend of a friend 5453:relational algebra 5435: 5406: 5384: 5294: 5274: 5246: 5214: 5185: 5144: 5106: 5051: 5019: 4987: 4947: 4915: 4878: 4849: 4817: 4782: 4750: 4636: 4568: 4483: 4463: 4441: 4382: 4306: 4255: 4233: 4165:Augustus De Morgan 4146: 4028:, also called the 4014: 3985: 3963: 3914: 3853: 3817: 3796:{\displaystyle V,} 3793: 3763: 3727:{\displaystyle B,} 3724: 3709:universal relation 3697: 3662:{\displaystyle A.} 3659: 3636: 3627: 3498: 3466: 3436: 3401: 3362: 3328: 3319: 3224: 3204: 3184: 3167:{\displaystyle a.} 3164: 3137: 3117: 3091: 3074:{\displaystyle B=} 3071: 3051:{\displaystyle A=} 3048: 3018: 2965: 2917: 2873: 2792: 2772: 2719: 2689:reflexive relation 2677: 2645: 2597: 2577: 2551: 2532:there exists some 2522: 2493: 2473: 2441: 2421: 2389: 2354: 2334: 2314: 2294: 2238: 2206: 2153: 2129: 2109: 2089: 2070:{\displaystyle S.} 2067: 2044: 2013: 1993: 1974:{\displaystyle R.} 1971: 1948: 1917: 1897: 1863: 1787: 1754: 1672: 1640: 1594: 1568: 1510: 1482: 1459: 1390: 1370: 1343: 1321: 1289: 1263: 1241: 1200: 1172: 1140: 1114: 1068: 1035: 1003: 963: 939: 912: 882: 842: 766: 691: 653: 615: 579: 553: 509: 469: 335: 309: 277: 241:Augustus De Morgan 227: 159: 133: 107: 6634:Binary operations 6616: 6615: 6574:Partially ordered 6383:Symmetric closure 6368:Reflexive closure 6111: 5909:Walter de Gruyter 5889:978-3-319-74451-3 5843: 5775:Irving Copilowish 5674:Dynamic Semantics 5662:McGill University 5632:978-0-521-63107-5 5534:978-0-521-76268-7 5506:978-0-8218-5035-0 5409:{\displaystyle n} 5377: 5362: 5353: 5338: 5330: 5297:{\displaystyle d} 5277:{\displaystyle c} 5239: 5210: 4888:is equivalent to 4792:is equivalent to 4748: 4737: 4730: 4712: 4705: 4692: 4634: 4626: 4615: 4566: 4559: 4546: 4486:{\displaystyle R} 4466:{\displaystyle S} 4453:left residual of 4436: 4429: 4416: 4376: 4361: 4348: 4338: 4288: 4258:{\displaystyle X} 4227: 4211: 4200: 4189: 4140: 4124: 4113: 4101: 4094: 4079: 4066: 4055: 4026:converse relation 4010: 3988:{\displaystyle S} 3944: 3886: 3820:{\displaystyle V} 3756: 3686: 3671:Correspondingly, 3526: 3491: 3429: 3391: 3374:transposed matrix 3358: 3342:converse relation 3227:{\displaystyle R} 3207:{\displaystyle B} 3187:{\displaystyle A} 3149:national language 3140:{\displaystyle b} 3094:{\displaystyle R} 3002: 2995: 2958: 2951: 2907: 2821: 2795:{\displaystyle R} 2715: 2673: 2638: 2600:{\displaystyle R} 2496:{\displaystyle B} 2466: 2444:{\displaystyle A} 2417: 2382: 2357:{\displaystyle R} 2337:{\displaystyle B} 2317:{\displaystyle A} 2156:{\displaystyle X} 2132:{\displaystyle X} 2112:{\displaystyle X} 2092:{\displaystyle X} 2016:{\displaystyle S} 1996:{\displaystyle R} 1920:{\displaystyle S} 1900:{\displaystyle R} 1856: 1840: 1825: 1768:converse relation 1604:linear subspaces 1513:{\displaystyle k} 1485:{\displaystyle k} 1404:. In particular 1393:{\displaystyle Y} 1373:{\displaystyle X} 1124:where the maps 981:Binary relations 739:dynamic semantics 440: 414: 400: 213: 192: 16:(Redirected from 6646: 6358:Linear extension 6107: 6087:Mirsky's theorem 5947: 5940: 5933: 5924: 5891: 5866: 5860: 5859: 5857: 5856: 5851: 5841: 5834: 5833: 5810: 5804: 5792: 5786: 5772: 5766: 5765: 5763: 5761: 5747: 5741: 5730: 5724: 5721: 5715: 5712: 5706: 5686: 5680: 5670: 5664: 5647: 5641: 5636: 5616: 5610: 5601: 5595: 5582: 5571: 5554: 5545: 5542: 5536: 5519: 5508: 5491: 5444: 5442: 5441: 5436: 5415: 5413: 5412: 5407: 5393: 5391: 5390: 5385: 5380: 5379: 5378: 5360: 5356: 5355: 5354: 5336: 5335: 5328: 5303: 5301: 5300: 5295: 5283: 5281: 5280: 5275: 5262: 5261: 5255: 5253: 5252: 5247: 5242: 5241: 5240: 5223: 5221: 5220: 5215: 5213: 5212: 5211: 5194: 5192: 5191: 5186: 5153: 5151: 5150: 5145: 5115: 5113: 5112: 5107: 5060: 5058: 5057: 5052: 5028: 5026: 5025: 5020: 4996: 4994: 4993: 4988: 4971:A fork operator 4956: 4954: 4953: 4948: 4924: 4922: 4921: 4916: 4908: 4887: 4885: 4884: 4879: 4858: 4856: 4855: 4850: 4826: 4824: 4823: 4818: 4791: 4789: 4788: 4783: 4759: 4757: 4756: 4751: 4749: 4744: 4740: 4739: 4738: 4732: 4731: 4723: 4718: 4713: 4708: 4707: 4706: 4698: 4695: 4694: 4693: 4682: 4680: 4645: 4643: 4642: 4637: 4635: 4630: 4629: 4628: 4627: 4617: 4616: 4608: 4604: 4602: 4594: 4580:Right residual: 4577: 4575: 4574: 4569: 4567: 4562: 4561: 4560: 4552: 4549: 4548: 4547: 4536: 4534: 4492: 4490: 4489: 4484: 4472: 4470: 4469: 4464: 4450: 4448: 4447: 4442: 4437: 4432: 4431: 4430: 4422: 4419: 4418: 4417: 4406: 4391: 4389: 4388: 4383: 4378: 4377: 4369: 4363: 4362: 4354: 4351: 4350: 4349: 4339: 4336: 4315: 4313: 4312: 4307: 4289: 4286: 4264: 4262: 4261: 4256: 4242: 4240: 4239: 4234: 4229: 4228: 4220: 4214: 4213: 4212: 4202: 4201: 4193: 4190: 4187: 4155: 4153: 4152: 4147: 4142: 4141: 4133: 4127: 4126: 4125: 4115: 4114: 4106: 4102: 4099: 4096: 4095: 4087: 4081: 4080: 4072: 4069: 4068: 4067: 4056: 4053: 4023: 4021: 4020: 4015: 4013: 4012: 4011: 3994: 3992: 3991: 3986: 3972: 3970: 3969: 3964: 3959: 3958: 3946: 3945: 3937: 3923: 3921: 3920: 3915: 3910: 3909: 3897: 3896: 3887: 3884: 3862: 3860: 3859: 3854: 3826: 3824: 3823: 3818: 3805:binary relations 3802: 3800: 3799: 3794: 3780:For a given set 3772: 3770: 3769: 3764: 3759: 3758: 3757: 3733: 3731: 3730: 3725: 3706: 3704: 3703: 3698: 3689: 3688: 3687: 3668: 3666: 3665: 3660: 3645: 3643: 3642: 3637: 3632: 3631: 3529: 3528: 3527: 3507: 3505: 3504: 3499: 3494: 3493: 3492: 3475: 3473: 3472: 3467: 3445: 3443: 3442: 3437: 3432: 3431: 3430: 3410: 3408: 3407: 3402: 3394: 3393: 3392: 3371: 3369: 3368: 3363: 3361: 3360: 3359: 3337: 3335: 3334: 3329: 3324: 3323: 3233: 3231: 3230: 3225: 3213: 3211: 3210: 3205: 3193: 3191: 3190: 3185: 3173: 3171: 3170: 3165: 3146: 3144: 3143: 3138: 3126: 3124: 3123: 3118: 3100: 3098: 3097: 3092: 3080: 3078: 3077: 3072: 3057: 3055: 3054: 3049: 3027: 3025: 3024: 3019: 3005: 3004: 3003: 2997: 2996: 2988: 2974: 2972: 2971: 2966: 2961: 2960: 2959: 2953: 2952: 2944: 2934:The composition 2926: 2924: 2923: 2918: 2910: 2909: 2908: 2882: 2880: 2879: 2874: 2824: 2823: 2822: 2801: 2799: 2798: 2793: 2781: 2779: 2778: 2773: 2728: 2726: 2725: 2720: 2718: 2717: 2716: 2686: 2684: 2683: 2678: 2676: 2675: 2674: 2654: 2652: 2651: 2646: 2641: 2640: 2639: 2611:), then for all 2606: 2604: 2603: 2598: 2586: 2584: 2583: 2578: 2560: 2558: 2557: 2552: 2531: 2529: 2528: 2523: 2502: 2500: 2499: 2494: 2482: 2480: 2479: 2474: 2469: 2468: 2467: 2450: 2448: 2447: 2442: 2430: 2428: 2427: 2422: 2420: 2419: 2418: 2398: 2396: 2395: 2390: 2385: 2384: 2383: 2363: 2361: 2360: 2355: 2343: 2341: 2340: 2335: 2323: 2321: 2320: 2315: 2303: 2301: 2300: 2295: 2248:An entry in the 2247: 2245: 2244: 2239: 2215: 2213: 2212: 2207: 2182:logical matrices 2162: 2160: 2159: 2154: 2138: 2136: 2135: 2130: 2118: 2116: 2115: 2110: 2098: 2096: 2095: 2090: 2076: 2074: 2073: 2068: 2053: 2051: 2050: 2045: 2022: 2020: 2019: 2014: 2002: 2000: 1999: 1994: 1980: 1978: 1977: 1972: 1957: 1955: 1954: 1949: 1926: 1924: 1923: 1918: 1906: 1904: 1903: 1898: 1872: 1870: 1869: 1864: 1859: 1858: 1857: 1843: 1842: 1841: 1828: 1827: 1826: 1796: 1794: 1793: 1788: 1763: 1761: 1760: 1755: 1686:modulo scalars. 1681: 1679: 1678: 1673: 1671: 1670: 1665: 1649: 1647: 1646: 1641: 1639: 1638: 1626: 1625: 1603: 1601: 1600: 1595: 1577: 1575: 1574: 1569: 1555: 1554: 1539: 1538: 1519: 1517: 1516: 1511: 1491: 1489: 1488: 1483: 1468: 1466: 1465: 1460: 1458: 1457: 1439: 1438: 1423: 1422: 1399: 1397: 1396: 1391: 1379: 1377: 1376: 1371: 1352: 1350: 1349: 1344: 1342: 1330: 1328: 1327: 1322: 1298: 1296: 1295: 1290: 1272: 1270: 1269: 1264: 1262: 1250: 1248: 1247: 1242: 1237: 1229: 1228: 1209: 1207: 1206: 1201: 1199: 1187:regular category 1181: 1179: 1178: 1173: 1149: 1147: 1146: 1141: 1123: 1121: 1120: 1115: 1113: 1112: 1084:the objects are 1077: 1075: 1074: 1069: 1067: 1066: 1044: 1042: 1041: 1036: 1012: 1010: 1009: 1004: 972: 970: 969: 964: 948: 946: 945: 940: 938: 937: 921: 919: 918: 913: 911: 910: 891: 889: 888: 883: 851: 849: 848: 843: 775: 773: 772: 767: 700: 698: 697: 692: 662: 660: 659: 654: 624: 622: 621: 616: 588: 586: 585: 580: 562: 560: 559: 554: 518: 516: 515: 510: 481:In other words, 478: 476: 475: 470: 441: 438: 415: 412: 401: 398: 345:is the relation 344: 342: 341: 336: 318: 316: 315: 310: 286: 284: 283: 278: 236: 234: 233: 228: 214: 211: 193: 190: 168: 166: 165: 160: 142: 140: 139: 134: 116: 114: 113: 108: 70:relative product 51: 36:binary relations 21: 6654: 6653: 6649: 6648: 6647: 6645: 6644: 6643: 6629:Algebraic logic 6619: 6618: 6617: 6612: 6608:Young's lattice 6464: 6392: 6331: 6181:Heyting algebra 6129:Boolean algebra 6101: 6082:Laver's theorem 6030: 5996:Boolean algebra 5991:Binary relation 5979: 5956: 5951: 5900: 5895: 5894: 5869:Gunther Schmidt 5867: 5863: 5822: 5814: 5813: 5811: 5807: 5793: 5789: 5781:13(4): 193–203 5773: 5769: 5759: 5757: 5749: 5748: 5744: 5731: 5727: 5722: 5718: 5713: 5709: 5697:Clarendon Press 5687: 5683: 5671: 5667: 5660:, page 6, from 5658:Wayback Machine 5648: 5644: 5633: 5618: 5617: 5613: 5602: 5598: 5585:Gunther Schmidt 5583: 5574: 5562:Kluwer Academic 5555: 5548: 5543: 5539: 5520: 5511: 5492: 5488: 5483: 5465: 5418: 5417: 5398: 5397: 5369: 5345: 5306: 5305: 5286: 5285: 5266: 5265: 5259: 5258: 5231: 5226: 5225: 5202: 5197: 5196: 5156: 5155: 5118: 5117: 5063: 5062: 5031: 5030: 4999: 4998: 4973: 4972: 4969: 4927: 4926: 4890: 4889: 4861: 4860: 4829: 4828: 4794: 4793: 4765: 4764: 4720: 4719: 4684: 4683: 4650: 4649: 4618: 4605: 4582: 4581: 4538: 4537: 4516: 4515: 4514:Left residual: 4500: 4475: 4474: 4455: 4454: 4408: 4407: 4394: 4393: 4340: 4318: 4317: 4267: 4266: 4247: 4246: 4203: 4169: 4168: 4116: 4058: 4034: 4033: 4002: 3997: 3996: 3977: 3976: 3950: 3930: 3929: 3901: 3888: 3869: 3868: 3865:complementation 3836: 3835: 3829:Boolean lattice 3809: 3808: 3782: 3781: 3778: 3748: 3736: 3735: 3713: 3712: 3678: 3673: 3672: 3648: 3647: 3626: 3625: 3620: 3615: 3610: 3604: 3603: 3598: 3593: 3588: 3582: 3581: 3576: 3571: 3566: 3560: 3559: 3554: 3549: 3544: 3534: 3518: 3510: 3509: 3483: 3478: 3477: 3452: 3451: 3421: 3416: 3415: 3383: 3378: 3377: 3350: 3345: 3344: 3318: 3317: 3312: 3307: 3301: 3300: 3295: 3290: 3284: 3283: 3278: 3273: 3267: 3266: 3261: 3256: 3246: 3240: 3239: 3216: 3215: 3196: 3195: 3176: 3175: 3153: 3152: 3129: 3128: 3103: 3102: 3083: 3082: 3060: 3059: 3037: 3036: 3033: 2985: 2977: 2976: 2941: 2936: 2935: 2899: 2885: 2884: 2813: 2808: 2807: 2784: 2783: 2731: 2730: 2707: 2693: 2692: 2665: 2657: 2656: 2630: 2613: 2612: 2589: 2588: 2563: 2562: 2534: 2533: 2508: 2507: 2485: 2484: 2458: 2453: 2452: 2433: 2432: 2409: 2401: 2400: 2374: 2369: 2368: 2346: 2345: 2326: 2325: 2306: 2305: 2304:that is, where 2271: 2270: 2267: 2218: 2217: 2186: 2185: 2178: 2165:neutral element 2145: 2144: 2121: 2120: 2101: 2100: 2081: 2080: 2056: 2055: 2029: 2028: 2005: 2004: 1985: 1984: 1960: 1959: 1933: 1932: 1909: 1908: 1889: 1888: 1848: 1832: 1817: 1799: 1798: 1772: 1771: 1701: 1700: 1692: 1660: 1655: 1654: 1630: 1617: 1606: 1605: 1580: 1579: 1522: 1521: 1502: 1501: 1474: 1473: 1406: 1405: 1382: 1381: 1362: 1361: 1333: 1332: 1301: 1300: 1275: 1274: 1253: 1252: 1212: 1211: 1190: 1189: 1152: 1151: 1126: 1125: 1096: 1095: 1050: 1049: 1015: 1014: 983: 982: 979: 955: 954: 929: 924: 923: 902: 897: 896: 865: 864: 789: 788: 746: 745: 744:A small circle 735:category theory 723:Gunther Schmidt 707: 665: 664: 627: 626: 591: 590: 565: 564: 521: 520: 483: 482: 439: and  347: 346: 321: 320: 289: 288: 257: 256: 253: 239:Beginning with 171: 170: 145: 144: 119: 118: 93: 92: 89:algebraic logic 43: 28: 23: 22: 15: 12: 11: 5: 6652: 6650: 6642: 6641: 6636: 6631: 6621: 6620: 6614: 6613: 6611: 6610: 6605: 6600: 6599: 6598: 6588: 6587: 6586: 6581: 6576: 6566: 6565: 6564: 6554: 6549: 6548: 6547: 6542: 6535:Order morphism 6532: 6531: 6530: 6520: 6515: 6510: 6505: 6500: 6499: 6498: 6488: 6483: 6478: 6472: 6470: 6466: 6465: 6463: 6462: 6461: 6460: 6455: 6453:Locally convex 6450: 6445: 6435: 6433:Order topology 6430: 6429: 6428: 6426:Order topology 6423: 6413: 6403: 6401: 6394: 6393: 6391: 6390: 6385: 6380: 6375: 6370: 6365: 6360: 6355: 6350: 6345: 6339: 6337: 6333: 6332: 6330: 6329: 6319: 6309: 6304: 6299: 6294: 6289: 6284: 6279: 6274: 6273: 6272: 6262: 6257: 6256: 6255: 6250: 6245: 6240: 6238:Chain-complete 6230: 6225: 6224: 6223: 6218: 6213: 6208: 6203: 6193: 6188: 6183: 6178: 6173: 6163: 6158: 6153: 6148: 6143: 6138: 6137: 6136: 6126: 6121: 6115: 6113: 6103: 6102: 6100: 6099: 6094: 6089: 6084: 6079: 6074: 6069: 6064: 6059: 6054: 6049: 6044: 6038: 6036: 6032: 6031: 6029: 6028: 6023: 6018: 6013: 6008: 6003: 5998: 5993: 5987: 5985: 5981: 5980: 5978: 5977: 5972: 5967: 5961: 5958: 5957: 5952: 5950: 5949: 5942: 5935: 5927: 5921: 5920: 5899: 5896: 5893: 5892: 5881:Springer books 5861: 5849: 5846: 5840: 5837: 5832: 5829: 5825: 5821: 5805: 5787: 5767: 5742: 5725: 5716: 5707: 5689:John M. Howie 5681: 5665: 5642: 5631: 5611: 5604:Ernst Schroder 5596: 5593:Springer books 5572: 5546: 5537: 5509: 5485: 5484: 5482: 5479: 5478: 5477: 5471: 5464: 5461: 5434: 5431: 5428: 5425: 5405: 5383: 5372: 5368: 5365: 5359: 5348: 5344: 5341: 5334: 5327: 5323: 5320: 5317: 5313: 5293: 5273: 5245: 5234: 5205: 5184: 5181: 5178: 5175: 5172: 5169: 5166: 5163: 5143: 5140: 5137: 5134: 5131: 5128: 5125: 5105: 5102: 5099: 5096: 5093: 5090: 5087: 5084: 5080: 5077: 5074: 5070: 5050: 5047: 5044: 5041: 5038: 5018: 5015: 5012: 5009: 5006: 4986: 4983: 4980: 4968: 4965: 4946: 4943: 4940: 4937: 4934: 4914: 4911: 4907: 4903: 4900: 4897: 4877: 4874: 4871: 4868: 4848: 4845: 4842: 4839: 4836: 4816: 4813: 4810: 4807: 4804: 4801: 4781: 4778: 4775: 4772: 4761: 4760: 4747: 4743: 4729: 4726: 4716: 4711: 4704: 4701: 4687: 4679: 4675: 4672: 4669: 4666: 4663: 4660: 4657: 4646: 4633: 4621: 4614: 4611: 4601: 4597: 4593: 4589: 4578: 4565: 4558: 4555: 4541: 4533: 4529: 4526: 4523: 4499: 4496: 4482: 4462: 4440: 4435: 4428: 4425: 4411: 4404: 4401: 4381: 4375: 4372: 4366: 4360: 4357: 4343: 4334: 4331: 4328: 4325: 4305: 4302: 4299: 4296: 4293: 4283: 4280: 4277: 4274: 4254: 4232: 4226: 4223: 4217: 4206: 4199: 4196: 4185: 4182: 4179: 4176: 4161:Ernst Schröder 4145: 4139: 4136: 4130: 4119: 4112: 4109: 4093: 4090: 4084: 4078: 4075: 4061: 4050: 4047: 4044: 4041: 4024:represent the 4005: 3984: 3962: 3957: 3953: 3949: 3943: 3940: 3913: 3908: 3904: 3900: 3895: 3891: 3882: 3879: 3876: 3852: 3849: 3846: 3843: 3816: 3792: 3789: 3777: 3776:Schröder rules 3774: 3762: 3751: 3747: 3743: 3723: 3720: 3696: 3693: 3681: 3658: 3655: 3635: 3630: 3624: 3621: 3619: 3616: 3614: 3611: 3609: 3606: 3605: 3602: 3599: 3597: 3594: 3592: 3589: 3587: 3584: 3583: 3580: 3577: 3575: 3572: 3570: 3567: 3565: 3562: 3561: 3558: 3555: 3553: 3550: 3548: 3545: 3543: 3540: 3539: 3537: 3532: 3521: 3517: 3497: 3486: 3465: 3462: 3459: 3435: 3424: 3413:matrix product 3400: 3397: 3386: 3353: 3327: 3322: 3316: 3313: 3311: 3308: 3306: 3303: 3302: 3299: 3296: 3294: 3291: 3289: 3286: 3285: 3282: 3279: 3277: 3274: 3272: 3269: 3268: 3265: 3262: 3260: 3257: 3255: 3252: 3251: 3249: 3236:logical matrix 3223: 3203: 3183: 3163: 3160: 3136: 3116: 3113: 3110: 3090: 3070: 3067: 3047: 3044: 3032: 3029: 3017: 3014: 3011: 3008: 2994: 2991: 2984: 2964: 2950: 2947: 2916: 2913: 2902: 2898: 2895: 2892: 2872: 2869: 2866: 2863: 2860: 2857: 2854: 2851: 2848: 2845: 2842: 2839: 2836: 2833: 2830: 2827: 2816: 2791: 2782:Similarly, if 2771: 2768: 2765: 2762: 2759: 2756: 2753: 2750: 2747: 2744: 2741: 2738: 2710: 2706: 2703: 2700: 2668: 2664: 2644: 2633: 2629: 2626: 2623: 2620: 2596: 2576: 2573: 2570: 2550: 2547: 2544: 2541: 2521: 2518: 2515: 2492: 2472: 2461: 2440: 2412: 2408: 2388: 2377: 2353: 2333: 2313: 2293: 2290: 2287: 2284: 2281: 2278: 2266: 2263: 2250:matrix product 2237: 2234: 2231: 2228: 2225: 2205: 2202: 2199: 2196: 2193: 2177: 2174: 2173: 2172: 2152: 2128: 2108: 2088: 2077: 2066: 2063: 2043: 2040: 2036: 2012: 1992: 1981: 1970: 1967: 1947: 1944: 1940: 1916: 1896: 1885: 1878: 1862: 1851: 1847: 1835: 1831: 1820: 1816: 1813: 1809: 1806: 1786: 1783: 1779: 1764: 1753: 1750: 1747: 1744: 1741: 1738: 1735: 1732: 1729: 1726: 1723: 1720: 1717: 1714: 1711: 1708: 1691: 1688: 1669: 1664: 1637: 1633: 1629: 1624: 1620: 1616: 1613: 1593: 1590: 1587: 1578:has morphisms 1567: 1564: 1561: 1558: 1553: 1550: 1547: 1542: 1537: 1534: 1531: 1509: 1481: 1456: 1453: 1450: 1445: 1442: 1437: 1434: 1431: 1426: 1421: 1418: 1415: 1389: 1369: 1341: 1320: 1317: 1314: 1311: 1308: 1288: 1285: 1282: 1261: 1240: 1236: 1232: 1227: 1224: 1221: 1198: 1171: 1168: 1165: 1162: 1159: 1150:are functions 1139: 1136: 1133: 1111: 1108: 1105: 1065: 1062: 1059: 1034: 1031: 1028: 1025: 1022: 1013:are morphisms 1002: 999: 996: 993: 990: 978: 975: 962: 936: 932: 909: 905: 881: 878: 875: 872: 841: 838: 835: 832: 829: 826: 823: 820: 817: 814: 811: 808: 805: 802: 799: 796: 765: 762: 759: 756: 753: 719:Ernst Schroder 715:infix notation 706: 703: 690: 687: 684: 681: 678: 675: 672: 652: 649: 646: 643: 640: 637: 634: 614: 610: 606: 602: 598: 578: 575: 572: 552: 549: 546: 543: 540: 537: 534: 531: 528: 508: 505: 502: 499: 496: 493: 490: 468: 465: 462: 459: 456: 453: 450: 447: 444: 436: 433: 430: 427: 424: 421: 418: 410: 407: 404: 396: 393: 390: 387: 384: 381: 378: 375: 372: 369: 366: 363: 360: 357: 354: 334: 331: 328: 308: 305: 302: 299: 296: 276: 273: 270: 267: 264: 252: 249: 226: 223: 220: 217: 209: 206: 203: 200: 197: 187: 184: 181: 178: 158: 155: 152: 132: 129: 126: 106: 103: 100: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 6651: 6640: 6637: 6635: 6632: 6630: 6627: 6626: 6624: 6609: 6606: 6604: 6601: 6597: 6594: 6593: 6592: 6589: 6585: 6582: 6580: 6577: 6575: 6572: 6571: 6570: 6567: 6563: 6560: 6559: 6558: 6557:Ordered field 6555: 6553: 6550: 6546: 6543: 6541: 6538: 6537: 6536: 6533: 6529: 6526: 6525: 6524: 6521: 6519: 6516: 6514: 6513:Hasse diagram 6511: 6509: 6506: 6504: 6501: 6497: 6494: 6493: 6492: 6491:Comparability 6489: 6487: 6484: 6482: 6479: 6477: 6474: 6473: 6471: 6467: 6459: 6456: 6454: 6451: 6449: 6446: 6444: 6441: 6440: 6439: 6436: 6434: 6431: 6427: 6424: 6422: 6419: 6418: 6417: 6414: 6412: 6408: 6405: 6404: 6402: 6399: 6395: 6389: 6386: 6384: 6381: 6379: 6376: 6374: 6371: 6369: 6366: 6364: 6363:Product order 6361: 6359: 6356: 6354: 6351: 6349: 6346: 6344: 6341: 6340: 6338: 6336:Constructions 6334: 6328: 6324: 6320: 6317: 6313: 6310: 6308: 6305: 6303: 6300: 6298: 6295: 6293: 6290: 6288: 6285: 6283: 6280: 6278: 6275: 6271: 6268: 6267: 6266: 6263: 6261: 6258: 6254: 6251: 6249: 6246: 6244: 6241: 6239: 6236: 6235: 6234: 6233:Partial order 6231: 6229: 6226: 6222: 6221:Join and meet 6219: 6217: 6214: 6212: 6209: 6207: 6204: 6202: 6199: 6198: 6197: 6194: 6192: 6189: 6187: 6184: 6182: 6179: 6177: 6174: 6172: 6168: 6164: 6162: 6159: 6157: 6154: 6152: 6149: 6147: 6144: 6142: 6139: 6135: 6132: 6131: 6130: 6127: 6125: 6122: 6120: 6119:Antisymmetric 6117: 6116: 6114: 6110: 6104: 6098: 6095: 6093: 6090: 6088: 6085: 6083: 6080: 6078: 6075: 6073: 6070: 6068: 6065: 6063: 6060: 6058: 6055: 6053: 6050: 6048: 6045: 6043: 6040: 6039: 6037: 6033: 6027: 6026:Weak ordering 6024: 6022: 6019: 6017: 6014: 6012: 6011:Partial order 6009: 6007: 6004: 6002: 5999: 5997: 5994: 5992: 5989: 5988: 5986: 5982: 5976: 5973: 5971: 5968: 5966: 5963: 5962: 5959: 5955: 5948: 5943: 5941: 5936: 5934: 5929: 5928: 5925: 5918: 5917:3-11-015248-7 5914: 5910: 5906: 5902: 5901: 5897: 5890: 5886: 5882: 5878: 5874: 5870: 5865: 5862: 5847: 5844: 5830: 5827: 5823: 5819: 5809: 5806: 5803: 5799: 5796: 5791: 5788: 5784: 5780: 5776: 5771: 5768: 5756: 5752: 5746: 5743: 5739: 5735: 5729: 5726: 5720: 5717: 5711: 5708: 5705: 5704:0-19-851194-9 5701: 5698: 5694: 5690: 5685: 5682: 5679: 5675: 5669: 5666: 5663: 5659: 5655: 5652: 5646: 5643: 5640: 5634: 5628: 5624: 5623: 5615: 5612: 5609: 5605: 5600: 5597: 5594: 5590: 5586: 5581: 5579: 5577: 5573: 5570: 5569:9789400920477 5566: 5563: 5559: 5553: 5551: 5547: 5541: 5538: 5535: 5531: 5528: 5524: 5518: 5516: 5514: 5510: 5507: 5503: 5500: 5496: 5490: 5487: 5480: 5475: 5472: 5470: 5467: 5466: 5462: 5460: 5458: 5454: 5451:operation of 5450: 5449: 5432: 5429: 5426: 5423: 5403: 5394: 5381: 5370: 5366: 5363: 5357: 5346: 5342: 5339: 5332: 5325: 5318: 5311: 5291: 5271: 5263: 5243: 5232: 5203: 5182: 5179: 5173: 5170: 5167: 5164: 5161: 5141: 5135: 5132: 5129: 5126: 5123: 5103: 5100: 5097: 5094: 5088: 5085: 5082: 5075: 5068: 5048: 5042: 5039: 5036: 5016: 5010: 5007: 5004: 4981: 4966: 4964: 4962: 4957: 4944: 4941: 4938: 4935: 4932: 4912: 4909: 4905: 4901: 4898: 4895: 4875: 4872: 4869: 4866: 4846: 4843: 4840: 4837: 4834: 4814: 4811: 4805: 4802: 4799: 4779: 4776: 4773: 4770: 4741: 4724: 4714: 4699: 4685: 4677: 4670: 4667: 4664: 4658: 4655: 4647: 4619: 4609: 4599: 4595: 4591: 4587: 4579: 4553: 4539: 4531: 4527: 4521: 4513: 4512: 4511: 4510:Definitions: 4508: 4505: 4497: 4495: 4493: 4480: 4460: 4438: 4423: 4409: 4402: 4399: 4379: 4370: 4364: 4355: 4341: 4332: 4329: 4326: 4323: 4303: 4300: 4297: 4294: 4291: 4281: 4278: 4275: 4272: 4252: 4243: 4230: 4221: 4215: 4204: 4194: 4183: 4180: 4177: 4174: 4166: 4162: 4157: 4143: 4134: 4128: 4117: 4107: 4088: 4082: 4073: 4059: 4048: 4045: 4042: 4039: 4031: 4027: 4003: 3982: 3973: 3960: 3955: 3951: 3947: 3938: 3927: 3911: 3906: 3902: 3898: 3893: 3889: 3880: 3877: 3874: 3866: 3850: 3844: 3834: 3830: 3814: 3806: 3790: 3787: 3775: 3773: 3760: 3749: 3745: 3741: 3721: 3718: 3710: 3694: 3691: 3679: 3669: 3656: 3653: 3633: 3628: 3622: 3617: 3612: 3607: 3600: 3595: 3590: 3585: 3578: 3573: 3568: 3563: 3556: 3551: 3546: 3541: 3535: 3530: 3519: 3515: 3495: 3484: 3463: 3460: 3457: 3449: 3433: 3422: 3414: 3398: 3395: 3384: 3375: 3351: 3343: 3338: 3325: 3320: 3314: 3309: 3304: 3297: 3292: 3287: 3280: 3275: 3270: 3263: 3258: 3253: 3247: 3237: 3221: 3201: 3181: 3161: 3158: 3150: 3134: 3114: 3111: 3108: 3088: 3068: 3065: 3045: 3042: 3030: 3028: 3015: 3012: 3009: 3006: 2989: 2982: 2962: 2945: 2932: 2930: 2914: 2911: 2900: 2896: 2893: 2890: 2883:In this case 2870: 2864: 2861: 2858: 2855: 2849: 2846: 2843: 2834: 2831: 2828: 2825: 2814: 2805: 2789: 2769: 2763: 2760: 2757: 2754: 2748: 2745: 2742: 2708: 2704: 2701: 2698: 2690: 2666: 2662: 2642: 2631: 2627: 2624: 2621: 2618: 2610: 2594: 2574: 2571: 2568: 2548: 2545: 2542: 2539: 2519: 2516: 2513: 2504: 2490: 2470: 2459: 2438: 2410: 2406: 2386: 2375: 2367: 2351: 2331: 2311: 2291: 2288: 2285: 2282: 2279: 2276: 2264: 2262: 2260: 2256: 2251: 2235: 2232: 2229: 2226: 2223: 2203: 2200: 2197: 2194: 2191: 2183: 2175: 2170: 2166: 2150: 2142: 2126: 2106: 2086: 2078: 2064: 2061: 2041: 2038: 2034: 2026: 2010: 1990: 1982: 1968: 1965: 1945: 1942: 1938: 1930: 1914: 1894: 1886: 1883: 1879: 1876: 1860: 1849: 1845: 1833: 1829: 1814: 1811: 1807: 1784: 1781: 1777: 1769: 1765: 1751: 1748: 1745: 1739: 1736: 1733: 1727: 1721: 1718: 1715: 1709: 1706: 1698: 1694: 1693: 1689: 1687: 1685: 1667: 1653: 1635: 1631: 1627: 1622: 1618: 1614: 1611: 1591: 1585: 1559: 1507: 1499: 1495: 1479: 1472: 1443: 1403: 1387: 1367: 1359: 1356: 1355:jointly monic 1318: 1315: 1312: 1309: 1306: 1286: 1280: 1188: 1183: 1169: 1163: 1160: 1157: 1137: 1131: 1093: 1092: 1087: 1083: 1082: 1048: 1032: 1026: 1023: 1020: 1000: 997: 994: 991: 988: 976: 974: 960: 952: 934: 930: 907: 903: 893: 876: 873: 863: 862:Juxtaposition 859: 855: 836: 827: 824: 821: 815: 806: 800: 794: 787: 783: 779: 778:John M. Howie 760: 757: 754: 742: 740: 736: 732: 728: 724: 720: 716: 712: 704: 702: 688: 685: 679: 676: 673: 650: 647: 641: 638: 635: 612: 608: 604: 600: 596: 576: 573: 570: 550: 547: 544: 541: 535: 532: 529: 506: 503: 500: 497: 494: 491: 488: 479: 466: 460: 457: 451: 448: 445: 434: 431: 425: 422: 419: 408: 405: 402: 394: 391: 388: 385: 382: 376: 373: 370: 361: 358: 355: 352: 332: 329: 326: 306: 303: 300: 297: 294: 274: 271: 268: 265: 262: 250: 248: 246: 242: 237: 224: 221: 218: 215: 207: 204: 201: 198: 195: 185: 182: 179: 176: 156: 153: 150: 130: 127: 124: 104: 101: 98: 90: 86: 81: 79: 75: 71: 67: 63: 59: 55: 50: 46: 41: 37: 33: 19: 6400:& Orders 6378:Star product 6342: 6307:Well-founded 6260:Prefix order 6216:Distributive 6206:Complemented 6176:Foundational 6141:Completeness 6097:Zorn's lemma 6001:Cyclic order 5984:Key concepts 5954:Order theory 5904: 5872: 5864: 5808: 5795:Vaughn Pratt 5790: 5770: 5760:26 September 5758:. Retrieved 5754: 5745: 5728: 5719: 5710: 5692: 5684: 5668: 5645: 5621: 5614: 5599: 5588: 5560:, page 121, 5557: 5540: 5522: 5494: 5489: 5446: 5395: 5304:is given by 5257: 4970: 4958: 4762: 4509: 4501: 4452: 4244: 4158: 4029: 3974: 3863:Recall that 3779: 3670: 3339: 3034: 2933: 2929:difunctional 2505: 2268: 2254: 2179: 2169:zero element 1652:finite field 1184: 1089: 1079: 980: 894: 857: 853: 743: 726: 708: 480: 254: 238: 82: 69: 65: 57: 53: 48: 44: 39: 29: 6584:Riesz space 6545:Isomorphism 6421:Normal cone 6343:Composition 6277:Semilattice 6186:Homogeneous 6171:Equivalence 6021:Total order 5879:vol. 2208, 5875:, page 26, 5676:§2.2, from 3831:ordered by 3214:is finite, 3174:Since both 2506:If for all 1697:associative 1684:ZX-calculus 625:(that is, 32:mathematics 6623:Categories 6552:Order type 6486:Cofinality 6327:Well-order 6302:Transitive 6191:Idempotent 6124:Asymmetric 5898:References 5783:Jstor link 5457:Join (SQL) 4504:operations 4163:, in fact 2931:relation. 2587:(that is, 2561:such that 2025:surjective 1690:Properties 1469:. Given a 1402:allegories 951:Z notation 782:semigroups 589:such that 251:Definition 6603:Upper set 6540:Embedding 6476:Antichain 6297:Tolerance 6287:Symmetric 6282:Semiorder 6228:Reflexive 6146:Connected 5828:− 5427:≥ 5358:∩ 5256:Then the 5177:→ 5171:× 5139:→ 5133:× 5098:× 5092:→ 5046:→ 5014:→ 4939:⊆ 4899:⊆ 4873:⊆ 4841:⊆ 4809:∖ 4803:⊆ 4777:⊆ 4746:¯ 4728:¯ 4715:∩ 4710:¯ 4703:¯ 4659:⁡ 4632:¯ 4613:¯ 4564:¯ 4557:¯ 4525:∖ 4498:Quotients 4434:¯ 4427:¯ 4403:⊆ 4374:¯ 4365:⊆ 4359:¯ 4330:⊆ 4298:⊆ 4279:⊆ 4225:¯ 4216:⊆ 4198:¯ 4181:⊆ 4138:¯ 4129:⊆ 4111:¯ 4092:¯ 4083:⊆ 4077:¯ 4046:⊆ 4030:transpose 3956:∁ 3942:¯ 3907:∁ 3899:⊆ 3894:∁ 3878:⊆ 3845:⊆ 3833:inclusion 3461:× 3101:given by 2993:¯ 2949:¯ 2894:⊆ 2862:∈ 2829:⊇ 2761:∈ 2702:⊆ 2543:∈ 2517:∈ 2364:with its 2286:× 2280:⊆ 2255:computing 2227:× 1929:injective 1628:⊕ 1615:⊆ 1589:→ 1444:≅ 1316:× 1310:⊆ 1284:→ 1167:→ 1135:→ 1030:→ 998:× 992:⊆ 961:∘ 931:∘ 904:∘ 825:∘ 758:∘ 731:coincides 711:semicolon 686:∈ 648:∈ 574:∈ 542:∈ 504:× 498:⊆ 458:∈ 432:∈ 406:∈ 389:× 383:∈ 304:× 298:⊆ 272:× 266:⊆ 245:syllogism 83:The word 78:functions 60:. In the 6398:Topology 6265:Preorder 6248:Eulerian 6211:Complete 6161:Directed 6151:Covering 6016:Preorder 5975:Category 5970:Glossary 5654:Archived 5463:See also 3827:forms a 2655:so that 2366:converse 1498:matrices 1360:between 1185:Given a 1047:category 854:reverses 6503:Duality 6481:Cofinal 6469:Related 6448:FrĂ©chet 6325:)  6201:Bounded 6196:Lattice 6169:)  6167:Partial 6035:Results 6006:Lattice 5800:, from 5691:(1995) 5606:(1895) 5445:is the 3924:In the 3707:is the 3476:matrix 3031:Example 2259:sorites 2163:is the 2027:, then 1931:, then 1045:in the 30:In the 6528:Subnet 6508:Filter 6458:Normed 6443:Banach 6409:& 6316:Better 6253:Strict 6243:Graded 6134:topics 5965:Topics 5915:  5887:  5842:  5738:U+2A1F 5734:U+2A3E 5702:  5629:  5567:  5532:  5504:  5361:  5337:  5329:  4961:Sudoku 2806:then 2451:) and 2141:monoid 852:which 713:as an 38:, the 6518:Ideal 6496:Graph 6292:Total 6270:Total 6156:Dense 5481:Notes 5061:into 3147:is a 3127:when 2802:is a 2687:is a 2607:is a 1500:over 1471:field 1358:spans 1078:. In 85:uncle 6109:list 5913:ISBN 5885:ISBN 5762:2023 5755:nlab 5736:and 5732:See 5700:ISBN 5627:ISBN 5565:ISBN 5530:ISBN 5502:ISBN 5448:join 5319:< 5284:and 5260:fork 5224:and 5154:and 5076:< 5029:and 4982:< 3340:The 3194:and 3035:Let 2483:(on 2431:(on 2324:and 2216:and 2023:are 2003:and 1927:are 1907:and 1766:The 1380:and 1086:sets 922:and 709:The 663:and 287:and 56:and 6523:Net 6323:Pre 5264:of 4656:syq 4473:by 4287:and 3975:If 3807:on 3711:on 3151:of 2691:or 2503:). 2261:." 2119:to 1983:If 1887:If 1797:is 1770:of 1331:in 1091:Set 1081:Rel 701:). 255:If 169:). 34:of 6625:: 5883:, 5753:. 5591:, 5575:^ 5549:^ 5512:^ 5459:. 5333::= 4963:. 4678::= 4600::= 4532::= 4494:. 2236:1. 1699:: 1520:, 1182:. 953:: 741:. 80:. 72:. 47:; 6321:( 6318:) 6314:( 6165:( 6112:) 5946:e 5939:t 5932:v 5919:. 5911:, 5848:. 5845:l 5839:) 5836:) 5831:1 5824:M 5820:n 5764:. 5635:. 5433:, 5430:2 5424:n 5404:n 5382:. 5376:T 5371:b 5367:; 5364:d 5352:T 5347:a 5343:; 5340:c 5326:d 5322:) 5316:( 5312:c 5292:d 5272:c 5244:. 5238:T 5233:b 5209:T 5204:a 5183:, 5180:B 5174:B 5168:A 5165:: 5162:b 5142:A 5136:B 5130:A 5127:: 5124:a 5104:. 5101:B 5095:A 5089:H 5086:: 5083:d 5079:) 5073:( 5069:c 5049:B 5043:H 5040:: 5037:d 5017:A 5011:H 5008:: 5005:c 4985:) 4979:( 4945:. 4942:D 4936:C 4933:Y 4913:, 4910:C 4906:/ 4902:D 4896:Y 4876:D 4870:C 4867:Y 4847:. 4844:B 4838:X 4835:A 4815:. 4812:B 4806:A 4800:X 4780:B 4774:X 4771:A 4742:F 4736:T 4725:E 4700:F 4691:T 4686:E 4674:) 4671:F 4668:, 4665:E 4662:( 4625:T 4620:C 4610:D 4596:C 4592:/ 4588:D 4554:B 4545:T 4540:A 4528:B 4522:A 4481:R 4461:S 4439:, 4424:S 4415:T 4410:R 4400:X 4380:, 4371:X 4356:S 4347:T 4342:R 4333:S 4327:X 4324:R 4304:. 4301:S 4295:R 4292:X 4282:S 4276:X 4273:R 4253:X 4231:. 4222:L 4210:T 4205:M 4195:N 4184:N 4178:M 4175:L 4144:. 4135:Q 4123:T 4118:R 4108:S 4089:R 4074:S 4065:T 4060:Q 4049:S 4043:R 4040:Q 4009:T 4004:S 3983:S 3961:. 3952:A 3948:= 3939:A 3912:. 3903:A 3890:B 3881:B 3875:A 3851:. 3848:) 3842:( 3815:V 3791:, 3788:V 3761:. 3755:T 3750:R 3746:; 3742:R 3722:, 3719:B 3695:R 3692:; 3685:T 3680:R 3657:. 3654:A 3634:. 3629:) 3623:1 3618:1 3613:1 3608:1 3601:1 3596:1 3591:0 3586:0 3579:1 3574:0 3569:1 3564:0 3557:1 3552:0 3547:0 3542:1 3536:( 3531:= 3525:T 3520:R 3516:R 3496:R 3490:T 3485:R 3464:3 3458:3 3434:R 3428:T 3423:R 3399:R 3396:; 3390:T 3385:R 3357:T 3352:R 3326:. 3321:) 3315:1 3310:1 3305:1 3298:1 3293:0 3288:0 3281:0 3276:1 3271:0 3264:0 3259:0 3254:1 3248:( 3222:R 3202:B 3182:A 3162:. 3159:a 3135:b 3115:b 3112:R 3109:a 3089:R 3069:= 3066:B 3046:= 3043:A 3016:. 3013:R 3010:= 3007:R 3001:T 2990:R 2983:R 2963:R 2957:T 2946:R 2915:. 2912:R 2906:T 2901:R 2897:R 2891:R 2871:. 2868:} 2865:B 2859:x 2856:: 2853:) 2850:x 2847:, 2844:x 2841:( 2838:{ 2835:= 2832:I 2826:R 2820:T 2815:R 2790:R 2770:. 2767:} 2764:A 2758:x 2755:: 2752:) 2749:x 2746:, 2743:x 2740:( 2737:{ 2714:T 2709:R 2705:R 2699:I 2672:T 2667:R 2663:R 2643:x 2637:T 2632:R 2628:R 2625:x 2622:, 2619:x 2595:R 2575:y 2572:R 2569:x 2549:, 2546:B 2540:y 2520:A 2514:x 2491:B 2471:R 2465:T 2460:R 2439:A 2416:T 2411:R 2407:R 2387:, 2381:T 2376:R 2352:R 2332:B 2312:A 2292:; 2289:B 2283:A 2277:R 2233:= 2230:1 2224:1 2204:1 2201:= 2198:1 2195:+ 2192:1 2171:. 2151:X 2127:X 2107:X 2087:X 2065:. 2062:S 2042:S 2039:; 2035:R 2011:S 1991:R 1969:. 1966:R 1946:S 1943:; 1939:R 1915:S 1895:R 1877:. 1861:. 1855:T 1850:R 1846:; 1839:T 1834:S 1830:= 1824:T 1819:) 1815:S 1812:; 1808:R 1805:( 1785:S 1782:; 1778:R 1752:. 1749:T 1746:; 1743:) 1740:S 1737:; 1734:R 1731:( 1728:= 1725:) 1722:T 1719:; 1716:S 1713:( 1710:; 1707:R 1668:2 1663:F 1636:m 1632:k 1623:n 1619:k 1612:R 1592:m 1586:n 1566:) 1563:) 1560:k 1557:( 1552:t 1549:a 1546:M 1541:( 1536:l 1533:e 1530:R 1508:k 1480:k 1455:l 1452:e 1449:R 1441:) 1436:t 1433:e 1430:S 1425:( 1420:l 1417:e 1414:R 1388:Y 1368:X 1340:X 1319:Y 1313:X 1307:R 1287:Y 1281:X 1260:X 1239:) 1235:X 1231:( 1226:l 1223:e 1220:R 1197:X 1170:Y 1164:X 1161:: 1158:f 1138:Y 1132:X 1110:l 1107:e 1104:R 1064:l 1061:e 1058:R 1033:Y 1027:X 1024:: 1021:R 1001:Y 995:X 989:R 935:r 908:l 880:) 877:S 874:R 871:( 840:) 837:x 834:( 831:) 828:f 822:g 819:( 816:= 813:) 810:) 807:x 804:( 801:f 798:( 795:g 764:) 761:S 755:R 752:( 689:S 683:) 680:z 677:, 674:y 671:( 651:R 645:) 642:y 639:, 636:x 633:( 613:z 609:S 605:y 601:R 597:x 577:Y 571:y 551:S 548:; 545:R 539:) 536:z 533:, 530:x 527:( 507:Z 501:X 495:S 492:; 489:R 467:. 464:} 461:S 455:) 452:z 449:, 446:y 443:( 435:R 429:) 426:y 423:, 420:x 417:( 409:Y 403:y 395:: 392:Z 386:X 380:) 377:z 374:, 371:x 368:( 365:{ 362:= 359:S 356:; 353:R 333:S 330:; 327:R 307:Z 301:Y 295:S 275:Y 269:X 263:R 225:. 222:z 219:U 216:x 208:z 205:P 202:y 199:B 196:x 186:P 183:B 180:= 177:U 157:z 154:P 151:y 131:y 128:B 125:x 105:z 102:U 99:x 58:S 54:R 49:S 45:R 20:)

Index

Relation composition
mathematics
binary relations
calculus of relations
Function composition
functions
uncle
algebraic logic
Augustus De Morgan
syllogism
semicolon
infix notation
Ernst Schroder
Gunther Schmidt
coincides
category theory
dynamic semantics
John M. Howie
semigroups
composition of functions
Juxtaposition
Z notation
category
Rel
sets
Set
regular category
jointly monic
spans
allegories

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