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732: 36: 721: 450: 325: 153: 443: 293: 119: 202: 436: 755: 57: 760: 366: 208: 100: 72: 615: 610: 230: 171:, or a logical constant denoting a proposition in logic that is always false (often called "falsum" or "absurdum"). 599: 418: 336: 79: 53: 46: 765: 86: 460: 361: 731: 547: 535: 356: 68: 692: 501: 489: 736: 664: 660: 543: 344: 301: 249: 725: 635: 678: 674: 340: 297: 329: 268: 157: 704: 700: 688: 586: 582: 574: 560: 531: 475: 288: 183: 175: 749: 652: 647: 310: 284: 275: 168: 93: 630: 626: 497: 371: 241: 179: 197:, which is the bottom element in the subtype relation. This may coincide with the 306: 226: 194: 190: 165: 35: 395: 570: 198: 485: 594: 523: 509: 428: 279: 17: 60: in this section. Unsourced material may be challenged and removed. 552: 207:
The "undefined value" in quantum physics interpretations that reject
519: 237: 149: 186:, which also represents absurdum when used for logical semantics 432: 29: 248:(the word "tee" in reverse). Tee plays a complementary or 444: 8: 469: 451: 437: 429: 390: 388: 240:of the up tack appears as an upside-down 120:Learn how and when to remove this message 384: 201:, which represents absurdum under the 7: 58:adding citations to reliable sources 27:Symbol used in mathematics and logic 419:"Conditional independence notation" 396:"Mathematical Operators – Unicode" 267:in LaTeX, U+27C2 in Unicode) is a 244:, and as such is sometimes called 25: 730: 719: 252:role in many of these theories. 34: 45:needs additional citations for 1: 367:List of mathematical symbols 209:counterfactual definiteness 203:Curry–Howard correspondence 782: 332:symbol used to represent: 271:symbol used to represent: 716: 467: 337:Conditional independence 231:APL programming language 737:Mathematics portal 756:Mathematical notation 726:Philosophy portal 357:Alternative plus sign 761:Mathematical symbols 257:perpendicular symbol 255:The similar-looking 54:improve this article 160:used to represent: 345:probability theory 302:probability theory 743: 742: 711: 710: 130: 129: 122: 104: 16:(Redirected from 773: 735: 734: 724: 723: 722: 568: 517: 483: 470: 453: 446: 439: 430: 423: 422: 421:. 27 March 2020. 415: 409: 408: 406: 405: 400: 392: 341:random variables 298:random variables 276:Perpendicularity 266: 229:decoding in the 156:) is a constant 147: 125: 118: 114: 111: 105: 103: 62: 38: 30: 21: 781: 780: 776: 775: 774: 772: 771: 770: 746: 745: 744: 739: 729: 728: 720: 718: 712: 707: 703: 695: 691: 683: 680: 677: 669: 666: 663: 655: 651: 646: 638: 634: 629: 621: 620: 617: 613: 605: 604: 601: 597: 589: 585: 577: 573: 564: 555: 551: 546: 538: 534: 526: 522: 513: 504: 500: 492: 488: 479: 463: 461:logical symbols 457: 427: 426: 417: 416: 412: 403: 401: 398: 394: 393: 386: 381: 353: 330:binary relation 269:binary relation 264: 216: 145: 126: 115: 109: 106: 63: 61: 51: 39: 28: 23: 22: 15: 12: 11: 5: 779: 777: 769: 768: 763: 758: 748: 747: 741: 740: 717: 714: 713: 709: 708: 699: 698: 696: 687: 686: 684: 673: 672: 670: 659: 658: 656: 642: 641: 639: 625: 624: 622: 618:quantification 614: 609: 608: 606: 602:quantification 598: 593: 592: 590: 581: 580: 578: 559: 558: 556: 542: 541: 539: 530: 529: 527: 508: 507: 505: 496: 495: 493: 474: 473: 468: 465: 464: 458: 456: 455: 448: 441: 433: 425: 424: 410: 383: 382: 380: 377: 376: 375: 369: 364: 359: 352: 349: 348: 347: 318:double tack up 314: 313: 304: 291: 289:linear algebra 282: 234: 233: 220: 219: 214: 205: 187: 184:lattice theory 176:bottom element 172: 128: 127: 42: 40: 33: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 778: 767: 766:Logic symbols 764: 762: 759: 757: 754: 753: 751: 738: 733: 727: 715: 706: 702: 697: 694: 690: 685: 682: 676: 671: 668: 662: 657: 654: 653:contradiction 649: 645: 640: 637: 632: 628: 623: 619: 612: 607: 603: 596: 591: 588: 584: 579: 576: 572: 567: 562: 557: 554: 549: 545: 540: 537: 533: 528: 525: 521: 516: 511: 506: 503: 499: 494: 491: 487: 482: 477: 472: 471: 466: 462: 454: 449: 447: 442: 440: 435: 434: 431: 420: 414: 411: 397: 391: 389: 385: 378: 373: 370: 368: 365: 363: 362:Contradiction 360: 358: 355: 354: 350: 346: 342: 338: 335: 334: 333: 331: 327: 323: 319: 312: 311:number theory 308: 305: 303: 299: 295: 292: 290: 286: 285:Orthogonality 283: 281: 277: 274: 273: 272: 270: 262: 258: 253: 251: 247: 243: 239: 232: 228: 225: 224: 223: 217: 210: 206: 204: 200: 196: 192: 188: 185: 181: 177: 173: 170: 167: 163: 162: 161: 159: 155: 151: 143: 139: 135: 124: 121: 113: 102: 99: 95: 92: 88: 85: 81: 78: 74: 71: –  70: 66: 65:Find sources: 59: 55: 49: 48: 43:This section 41: 37: 32: 31: 19: 643: 565: 514: 480: 413: 402:. Retrieved 372:Tee (symbol) 324:, U+2AEB in 321: 317: 315: 294:Independence 278:of lines in 260: 256: 254: 245: 235: 221: 212: 180:wheel theory 152:, U+22A5 in 141: 137: 133: 131: 116: 107: 97: 90: 83: 76: 64: 52:Please help 47:verification 44: 616:existential 307:Coprimality 227:Mixed radix 222:as well as 195:type theory 191:bottom type 166:truth value 750:Categories 404:2013-07-20 242:tee symbol 199:empty type 80:newspapers 693:therefore 681:therefore 636:tautology 600:universal 211:, as in ( 69:"Up tack" 679:entails, 665:entails, 553:superset 351:See also 320:symbol ( 280:geometry 110:May 2014 18:Absurdum 705:because 569:  548:implies 536:implies 518:  484:  459:Common 328:) is a 326:Unicode 169:'false' 154:Unicode 134:up tack 94:scholar 667:proves 563:  512:  478:  158:symbol 138:falsum 96:  89:  82:  75:  67:  648:false 486:& 399:(PDF) 379:Notes 265:\perp 238:glyph 150:LaTeX 101:JSTOR 87:books 631:true 587:nand 316:The 250:dual 236:The 189:The 182:and 174:The 164:The 146:\bot 132:The 73:news 575:iff 524:not 490:and 374:(⊤) 343:in 339:of 309:in 300:in 296:of 287:in 246:eet 218:,⊥) 193:in 178:in 148:in 136:or 56:by 752:: 566:or 515:or 502:or 481:or 387:^ 263:, 144:, 701:∵ 689:∴ 675:⊨ 661:⊢ 650:, 644:⊥ 633:, 627:⊤ 611:∃ 595:∀ 583:| 571:≡ 561:↔ 550:, 544:⊃ 532:→ 520:~ 510:¬ 498:∨ 476:∧ 452:e 445:t 438:v 407:. 322:⫫ 261:⟂ 259:( 215:0 213:r 142:⊥ 140:( 123:) 117:( 112:) 108:( 98:· 91:· 84:· 77:· 50:. 20:)

Index

Absurdum

verification
improve this article
adding citations to reliable sources
"Up tack"
news
newspapers
books
scholar
JSTOR
Learn how and when to remove this message
LaTeX
Unicode
symbol
truth value
'false'
bottom element
wheel theory
lattice theory
bottom type
type theory
empty type
Curry–Howard correspondence
counterfactual definiteness
Mixed radix
APL programming language
glyph
tee symbol
dual

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