Knowledge (XXG)

Continuum (topology)

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968: 751: 989: 957: 1026: 999: 979: 339: 1029: 633:, M. Barge and J. Kennedy, in Open Problems in Topology, J. van Mill and G.M. Reed (Editors) Elsevier Science Publishers B.V. (North-Holland), 1990. 630: 663: 1017: 1012: 607: 408:
are among the simplest examples of indecomposable homogeneous continua. They are neither arcwise connected nor locally connected.
1007: 311:-axis. It is a one-dimensional continuum that is not arcwise connected, and it is locally disconnected at the points along the 909: 419:, is a one-dimensional planar Peano continuum that contains a homeomorphic image of any one-dimensional planar continuum. 917: 581: 323: 284: 1050: 988: 716: 172: 1002: 937: 932: 858: 735: 723: 696: 656: 405: 779: 706: 195: 20: 967: 927: 879: 853: 978: 774: 972: 922: 843: 833: 711: 691: 331: 942: 960: 826: 784: 649: 603: 412: 277: 175:
is a continuum that cannot be represented as the union of two proper subcontinua. A continuum
165: 391:-dimensional homogeneous continuum that is not contractible, and therefore different from an 740: 686: 571: 31: 799: 794: 359: 326:
by an arc connecting (0,−1) and (1,sin(1)). It is a one-dimensional continuum whose
221: 100: 52: 45: 889: 821: 518: 327: 276:. An arc is the simplest and most familiar type of a continuum. It is one-dimensional, 1044: 899: 809: 789: 576: 553: 319: 42: 992: 884: 804: 750: 399: 217: 48: 27: 982: 894: 838: 769: 728: 423: 863: 435:
There are two fundamental techniques for constructing continua, by means of
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is a subset of the plane that is the union of the graph of the function
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A nonempty compact connected metric space in point-set topology
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is a homogeneous hereditarily indecomposable planar continuum.
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A finite or countable product of continua is a continuum.
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A continuum that contains more than one point is called
365:. It is contractible and is the simplest example of an 908: 872: 758: 679: 198:. A one-dimensional continuum is often called a 99:. A space homeomorphic to a subcontinuum of the 602:. Pure and Applied Mathematics, Marcel Dekker. 657: 8: 387:+ 1)-dimensional Euclidean space. It is an 51:, or, less frequently, a compact connected 1025: 998: 664: 650: 642: 631:Continuum Theory and Topological Dynamics 477:, then their intersection is a continuum. 379:is a space homeomorphic to the standard 458:} is a nested family of continua, i.e. 504:)} is an inverse sequence of continua 354:is a space homeomorphic to the closed 402:is an infinite-dimensional continuum. 7: 91:itself is a continuum is called a 63:devoted to the study of continua. 14: 621:Open problems in continuum theory 600:Continuum theory. An introduction 330:are all trivial, but it is not a 194:of a continuum usually means its 1024: 997: 987: 977: 966: 956: 955: 749: 322:is obtained by "closing up" the 303:≤ 1 with the segment −1 ≤ 133:, there exists a homeomorphism 1: 626:Examples in continuum theory 181:hereditarily indecomposable 1067: 918:Banach fixed-point theorem 582:Shape theory (mathematics) 417:Sierpinski universal curve 38:(plural: "continua") is a 18: 951: 747: 183:if every subcontinuum of 280:, and locally connected. 173:indecomposable continuum 121:if for every two points 19:Not to be confused with 369:-dimensional continuum. 324:topologist's sine curve 285:topologist's sine curve 232:is a homeomorphism and 164:is a continuum that is 973:Mathematics portal 873:Metrics and properties 859:Second-countable space 343: 341: 264:; one also says that 196:topological dimension 21:Continuity (topology) 928:Invariance of domain 880:Euler characteristic 854:Bundle (mathematics) 437:nested intersections 415:, also known as the 938:Tychonoff's theorem 933:Poincaré conjecture 687:General (point-set) 598:Sam B. Nadler, Jr, 923:De Rham cohomology 844:Polyhedral complex 834:Simplicial complex 344: 332:contractible space 187:is indecomposable. 32:point-set topology 1038: 1037: 827:fundamental group 515:coordinate spaces 413:Sierpinski carpet 278:arcwise connected 166:locally connected 59:is the branch of 1058: 1051:Continuum theory 1028: 1027: 1001: 1000: 991: 981: 971: 970: 959: 958: 753: 666: 659: 652: 643: 572:Linear continuum 517:, together with 108:planar continuum 57:Continuum theory 1066: 1065: 1061: 1060: 1059: 1057: 1056: 1055: 1041: 1040: 1039: 1034: 965: 947: 943:Urysohn's lemma 904: 868: 754: 745: 717:low-dimensional 675: 670: 617: 595: 590: 568: 556:is a continuum. 547: 538: 528: 519:continuous maps 512: 503: 494: 476: 466: 457: 433: 360:Euclidean space 328:homotopy groups 268:is an arc from 256:are called the 222:closed interval 209: 162:Peano continuum 101:Euclidean plane 83:of a continuum 69: 53:Hausdorff space 24: 17: 12: 11: 5: 1064: 1062: 1054: 1053: 1043: 1042: 1036: 1035: 1033: 1032: 1022: 1021: 1020: 1015: 1010: 995: 985: 975: 963: 952: 949: 948: 946: 945: 940: 935: 930: 925: 920: 914: 912: 906: 905: 903: 902: 897: 892: 890:Winding number 887: 882: 876: 874: 870: 869: 867: 866: 861: 856: 851: 846: 841: 836: 831: 830: 829: 824: 822:homotopy group 814: 813: 812: 807: 802: 797: 792: 782: 777: 772: 762: 760: 756: 755: 748: 746: 744: 743: 738: 733: 732: 731: 721: 720: 719: 709: 704: 699: 694: 689: 683: 681: 677: 676: 671: 669: 668: 661: 654: 646: 640: 639: 637:Hyperspacewiki 634: 628: 623: 616: 615:External links 613: 612: 611: 594: 591: 589: 586: 585: 584: 579: 574: 567: 564: 560: 559: 558: 557: 543: 533: 524: 508: 499: 490: 481: 480: 479: 478: 471: 462: 453: 441:inverse limits 432: 429: 428: 427: 420: 409: 403: 396: 370: 336: 335: 316: 281: 208: 205: 204: 203: 188: 169: 168:at each point. 158: 111: 77: 68: 65: 15: 13: 10: 9: 6: 4: 3: 2: 1063: 1052: 1049: 1048: 1046: 1031: 1023: 1019: 1016: 1014: 1011: 1009: 1006: 1005: 1004: 996: 994: 990: 986: 984: 980: 976: 974: 969: 964: 962: 954: 953: 950: 944: 941: 939: 936: 934: 931: 929: 926: 924: 921: 919: 916: 915: 913: 911: 907: 901: 900:Orientability 898: 896: 893: 891: 888: 886: 883: 881: 878: 877: 875: 871: 865: 862: 860: 857: 855: 852: 850: 847: 845: 842: 840: 837: 835: 832: 828: 825: 823: 820: 819: 818: 815: 811: 808: 806: 803: 801: 798: 796: 793: 791: 788: 787: 786: 783: 781: 778: 776: 773: 771: 767: 764: 763: 761: 757: 752: 742: 739: 737: 736:Set-theoretic 734: 730: 727: 726: 725: 722: 718: 715: 714: 713: 710: 708: 705: 703: 700: 698: 697:Combinatorial 695: 693: 690: 688: 685: 684: 682: 678: 674: 667: 662: 660: 655: 653: 648: 647: 644: 638: 635: 632: 629: 627: 624: 622: 619: 618: 614: 609: 608:0-8247-8659-9 605: 601: 597: 596: 592: 587: 583: 580: 578: 577:Menger sponge 575: 573: 570: 569: 565: 563: 555: 554:inverse limit 551: 548:, called the 546: 542: 536: 532: 527: 523: 520: 516: 513:, called the 511: 507: 502: 498: 493: 489: 485: 484: 483: 482: 474: 470: 465: 461: 456: 452: 448: 447: 446: 445: 444: 442: 438: 430: 425: 421: 418: 414: 410: 407: 404: 401: 397: 394: 390: 386: 382: 378: 376: 371: 368: 364: 361: 357: 353: 351: 346: 345: 342:Warsaw circle 340: 333: 329: 325: 321: 320:Warsaw circle 317: 314: 310: 306: 302: 298: 294: 290: 286: 282: 279: 275: 271: 267: 263: 259: 255: 251: 247: 243: 239: 235: 231: 227: 223: 219: 215: 211: 210: 206: 201: 197: 193: 189: 186: 182: 178: 174: 170: 167: 163: 159: 156: 152: 148: 144: 140: 136: 132: 128: 124: 120: 116: 112: 109: 105: 102: 98: 94: 90: 86: 82: 78: 75: 74:nondegenerate 71: 70: 66: 64: 62: 58: 54: 50: 47: 44: 41: 37: 33: 29: 22: 1030:Publications 895:Chern number 885:Betti number 768: / 759:Key concepts 707:Differential 701: 599: 561: 550:bonding maps 549: 544: 540: 534: 530: 525: 521: 514: 509: 505: 500: 496: 491: 487: 472: 468: 463: 459: 454: 450: 440: 436: 434: 416: 400:Hilbert cube 392: 388: 384: 374: 373: 366: 362: 349: 348: 312: 308: 304: 300: 296: 292: 288: 273: 269: 265: 261: 257: 253: 249: 245: 241: 237: 233: 229: 225: 218:homeomorphic 213: 199: 191: 184: 180: 176: 161: 154: 150: 146: 142: 138: 134: 130: 126: 122: 118: 114: 113:A continuum 107: 106:is called a 103: 96: 93:subcontinuum 92: 88: 84: 80: 73: 56: 49:metric space 35: 28:mathematical 25: 993:Wikiversity 910:Key results 552:, then its 307:≤ 1 of the 216:is a space 119:homogeneous 67:Definitions 839:CW complex 780:Continuity 770:Closed set 729:cohomology 588:References 431:Properties 424:pseudo-arc 299:), 0 < 295:) = sin(1/ 145:such that 87:such that 1018:geometric 1013:algebraic 864:Cobordism 800:Hausdorff 795:connected 712:Geometric 702:Continuum 692:Algebraic 406:Solenoids 258:endpoints 192:dimension 79:A subset 46:connected 36:continuum 30:field of 1045:Category 983:Wikibook 961:Category 849:Manifold 817:Homotopy 775:Interior 766:Open set 724:Homology 673:Topology 566:See also 383:in the ( 381:n-sphere 207:Examples 61:topology 40:nonempty 1008:general 810:uniform 790:compact 741:Digital 593:Sources 377:-sphere 358:in the 220:to the 43:compact 26:In the 1003:Topics 805:metric 680:Fields 606:  395:-cell. 315:-axis. 244:(1) = 236:(0) = 785:Space 486:If {( 352:-cell 248:then 228:: → 224:. If 200:curve 604:ISBN 449:If { 439:and 422:The 411:The 398:The 356:ball 318:The 283:The 252:and 240:and 190:The 153:) = 125:and 34:, a 372:An 347:An 272:to 260:of 214:arc 212:An 179:is 171:An 129:in 117:is 95:of 1047:: 539:→ 537:+1 529:: 495:, 475:+1 467:⊇ 443:. 160:A 141:→ 137:: 55:. 665:e 658:t 651:v 610:. 545:n 541:X 535:n 531:X 526:n 522:f 510:n 506:X 501:n 497:f 492:n 488:X 473:n 469:X 464:n 460:X 455:n 451:X 393:n 389:n 385:n 375:n 367:n 363:R 350:n 334:. 313:y 309:y 305:y 301:x 297:x 293:x 291:( 289:f 274:q 270:p 266:X 262:X 254:q 250:p 246:q 242:h 238:p 234:h 230:X 226:h 202:. 185:X 177:X 157:. 155:y 151:x 149:( 147:h 143:X 139:X 135:h 131:X 127:y 123:x 115:X 110:. 104:R 97:X 89:A 85:X 81:A 76:. 23:.

Index

Continuity (topology)
mathematical
point-set topology
nonempty
compact
connected
metric space
Hausdorff space
topology
Euclidean plane
locally connected
indecomposable continuum
topological dimension
homeomorphic
closed interval
arcwise connected
topologist's sine curve
Warsaw circle
topologist's sine curve
homotopy groups
contractible space

ball
Euclidean space
n-sphere
Hilbert cube
Solenoids
Sierpinski carpet
pseudo-arc
continuous maps

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