Knowledge (XXG)

Belief merging

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Everaere, Konieczny and Marquis study belief-merging operators in settings in which the different information sources are strategic, and may try to change their stated beliefs in order to influence the outcome. They study strategyproof merging operators.
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Konieczny and Perez extended their framework to merging under a set of exogenously imposed constraints that have to be satisfied by the combined database. Their framework is now the standard framework for belief merging. In their framework, a
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Combination operators ignore the information about the source of the knowledge bases, so they cannot take into account the number of experts supporting each proposition. In particular, they cannot make decisions based on a majority vote among
451:. To illustrate, suppose three experts support propositions x1,x2,x3,x4 and oppose propositions y1,y2,y3,y4, whereas a fourth expert opposes propositions x1,x2,x3,x4 and supports propositions y1,y2,y3,y4. Then: 458:
The egalitarian rule (minimizing the maximum distances) will choose x1,x2,y1,y2; this is unfair to the majority experts, who are represented by only 2 out of 4 propositions, even though they are 3/4 of the
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Konieczny, Lang and Marquis present the DA framework, which generalizes the merging framework. They prove that, in this framework, query entailment from merged bases is only at the first level of the
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approach, we take the union of the knowledge bases (a finite set of logical formulas). If the union is consistent, we are done. Otherwise, we select some maximal consistent subset of it. Baral,
514:- a similar term but refers to a different process, in which the beliefs are expressed as probability distributions over events, and the goal is to aggregate them into a single distribution. 104:
Combination is syntax-dependent, whereas merging is based on the principle of irrelevance of syntax: an operation on two equivalent databases should return two equivalent databases.
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approach, the assumption is that all sources of information (both old and new) are equally reliable, so the resulting base should contain as much as possible of both sources.
495:- a closely-related process, in which several experts express their own judgement (as a logical formula), and society has to aggregate them in a consistent way. 411:, in which opinions of different citizens have to be combined into a single "social" opinion. Meyer, Ghose and Chopra relate belief-merging to social choice, 455:
The utilitarian rule (minimizing the sum of distances) will choose x1,x2,x3,x4; this is unfair to the minority expert, who is not represented at all.
508:- a closely-related process, in which an individual changes an existing knowledge base after receiving a new and conflicting piece of information. 1391: 1349: 1273: 1228: 1093: 909: 751: 549: 441:
Haret and Wallner show that most aggregation procedures are manipulable, and study the computational complexity of finding a manipulation.
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approach was presented by Konieczny and Perez. There are several differences between combination operators and merging operators:
31:, into a consistent knowledge-base. Applications include combining conflicting sensor information received by the same agent (see 423: 1478: 539: 76:, for combining multiple knowledge bases which may have inconsistencies, uncertainties, and nonmonotonic modes of negation. 473:
can be seen as a special case of belief-merging with constraints, where the constraints encode the size of the committee.
463: 412: 1467: 1215:. Lecture Notes in Computer Science. Vol. 11468. Cham: Springer International Publishing. pp. 133–150. 447:
Haret, Lackner, Pfandler and Wallner study belief-merging operators that satisfy fairness properties, similar to
27:, is a process in which an individual agent aggregates possibly conflicting pieces of information, expressed in 448: 466:, would choose x1,x2,x3,y1, which satisfies "justified representation" for both the minority and the majority. 72:, and to resolve inconsistencies among them.Subrahamanian presents a uniform theoretical framework, based on 1409:"Belief merging and the discursive dilemma: an argument-based account to paradoxes of judgment aggregation" 875:
Proceedings of the Seventh International Conference on Principles of Knowledge Representation and Reasoning
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Proceedings of the twelfth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems - PODS '93
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Haret, Pfandler and Woltran consider some classic social choice axioms in the context of belief merging.
1004: 492: 126: 1110: 957: 1378:. Lecture Notes in Computer Science. Vol. 3571. Berlin, Heidelberg: Springer. pp. 514–526. 1080:. Lecture Notes in Computer Science. Vol. 2143. Berlin, Heidelberg: Springer. pp. 466–477. 896:. Lecture Notes in Computer Science. Vol. 1638. Berlin, Heidelberg: Springer. pp. 233–244. 396: 482: 196: 170: 44: 1436: 1234: 1189: 1161: 851: 804: 757: 649: 597: 511: 470: 1208: 1370: 1428: 1387: 1345: 1312: 1269: 1224: 1181: 1130: 1089: 1054: 977: 905: 843: 796: 747: 712: 641: 589: 545: 419: 69: 1073: 889: 1420: 1379: 1337: 1302: 1261: 1216: 1171: 1122: 1081: 1044: 996: 969: 938: 897: 835: 788: 739: 704: 631: 581: 384: 366: 358: 156: 1507: 1017: 505: 28: 1149: 68:, Minker and Subrahmanian present algorithms for combining knowledge-bases consisting of 1366: 1290: 1253: 585: 163: 1331: 1289:
Haret, Adrian; Lackner, Martin; Pfandler, Andreas; Wallner, Johannes P. (2020-04-03).
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The formal methods developed for belief merging have been applied in other areas of
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Proceedings of the Twenty-second European Conference on Artificial Intelligence
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Baral, Chitta; Kraus, Sarit; Minker, Jack; Subrahmanian, V. S. (1992-02-01).
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and the interpretation of the outcome (where "distance" can be measured by
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and the interpretation of the outcome. This corredponds similarly to the
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They present several operators that satisfy all these properties, e.g.:
151:, representing constraints. It should satisfy the following postulates: 776: 1176: 871:"On the difference between merging knowledge bases and combining them" 792: 1254:"Beyond IC postulates: classification criteria for merging operators" 708: 692: 1372:
Symbolic and Quantitative Approaches to Reasoning with Uncertainty
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Symbolic and Quantitative Approaches to Reasoning with Uncertainty
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Symbolic and Quantitative Approaches to Reasoning and Uncertainty
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Haret, Adrian; Pfandler, Andreas; Woltran, Stefan (2016-08-29).
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Gauwin, Olivier; Konieczny, SĂ©bastien; Marquis, Pierre (2005).
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Elmagarmid, Ahmed K.; Rusinkiewicz, Marek; Sheth, Amit (1999).
1450: 1211:. In Calimeri, Francesco; Leone, Nicola; Manna, Marco (eds.). 1111:"Social choice theory, belief merging, and strategy-proofness" 570:"COMBINING KNOWLEDGE BASES CONSISTING OF FIRST-ORDER THEORIES" 1295:
Proceedings of the AAAI Conference on Artificial Intelligence
927:"Merging Information Under Constraints: A Logical Framework" 541:
Management of Heterogeneous and Autonomous Database Systems
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is consistent, then f(P,c) equals this logical conjunction.
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Chopra, Samir; Ghose, Aditya; Meyer, Thomas (2006-03-01).
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Everaere, P.; Konieczny, S.; Marquis, P. (2007-02-06).
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Konieczny, SĂ©bastien; Pino PĂ©rez, RamĂłn (2005-02-01).
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Konieczny, SĂ©bastien; Pino PĂ©rez, RamĂłn (2011-04-01).
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to it so that it can be listed with similar articles.
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Meyer, Thomas; Ghose, Aditya; Chopra, Samir (2001).
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IEEE Transactions on Knowledge and Data Engineering
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IEEE Transactions on Knowledge and Data Engineering
365:correspond to agens, then this corresponds to the 1076:. In Benferhat, Salem; Besnard, Philippe (eds.). 964:. Decision Analysis and Artificial Intelligence. 418:Chpora, Ghose and Meyer relate belief-merging to 1117:. Logic-based Approaches to Information Fusion. 1031:Konieczny, S; Lang, J; Marquis, P (2004-08-01). 888:Konieczny, SĂ©bastien; PĂ©rez, RamĂłn Pino (1999). 250:is consistent iff the logical conjunction of f(p 777:"Arbitration (or how to merge knowledge bases)" 691:Baral, C.; Kraus, S.; Minker, J. (1991-06-01). 1333:Multi-Winner Voting with Approval Preferences 1150:"The Strategy-Proofness Landscape of Merging" 892:. In Hunter, Anthony; Parsons, Simon (eds.). 238:models c, then the logical conjunction of f(p 8: 1207:Haret, Adrian; Wallner, Johannes P. (2019). 372:Minimizing the largest distance between the 346:Minimizing the sum of distances between the 1154:Journal of Artificial Intelligence Research 520:- aggregating data from different sensors. 1306: 1175: 1165: 1048: 997:"Belief Merging and Judgment Aggregation" 635: 330:is consistent, then f(P, conjunction of c 1330:Lackner, Martin; Skowron, Piotr (2023). 962:European Journal of Operational Research 434:hold in their belief-merging framework. 1074:"Social Choice, Merging, and Elections" 530: 147:different experts, and another formula 1013: 1002: 407:Belief merging is somewhat related to 361:or another metric). If the formulas p 7: 1260:. ECAI'16. NLD: IOS Press: 372–380. 890:"Merging with Integrity Constraints" 775:Liberatore, P.; Schaerf, M. (1998). 693:"Combining Multiple Knowledge Bases" 624:ACM Transactions on Database Systems 613: 611: 563: 561: 143:), representing e.g. claims made by 869:Konieczny, SĂ©bastien (2000-04-11). 1466:needs additional or more specific 618:Subrahmanian, V. S. (1994-06-01). 586:10.1111/j.1467-8640.1992.tb00337.x 14: 1407:Pigozzi, Gabriella (2006-09-01). 1213:Logics in Artificial Intelligence 995:Pigozzi, Gabriella (2015-07-08). 1455: 931:Journal of Logic and Computation 403:Belief merging and social choice 322:IC8: If the conjunction of f(P,c 121:that takes as input a vector of 730:Revesz, Peter Z. (1993-08-01). 462:A new suggested rule, based on 828:Journal of Philosophical Logic 620:"Amalgamating knowledge bases" 284:IC6: If the conjunction of f(P 43:. It also has applications in 1: 1291:"Proportional Belief Merging" 1266:10.3233/978-1-61499-672-9-372 428:Gibbard–Satterthwaite theorem 424:Arrow's impossibility theorem 303:IC7: The conjunction of f(P,c 1127:10.1016/j.inffus.2005.05.003 1050:10.1016/j.artint.2004.04.008 925:Konieczny, S. (2002-10-01). 464:Proportional approval voting 415:and preference aggregation. 311:models f(P, conjunction of c 166:, then f(P,c) is consistent. 25:propositional belief merging 1221:10.1007/978-3-030-19570-0_9 292:,c) is consistent, then f(P 265:IC5: The conjunction of f(P 1524: 1039:. Nonmonotonic Reasoning. 974:10.1016/j.ejor.2003.06.039 574:Computational Intelligence 1425:10.1007/s11229-006-9063-7 840:10.1007/s10992-011-9175-5 668:"Modern database systems" 125:consistent (satisfiable) 35:) and combining multiple 1369:. In Godo, LluĂ­s (ed.). 1308:10.1609/aaai.v34i03.5671 1086:10.1007/3-540-44652-4_41 902:10.1007/3-540-48747-6_22 449:justified representation 1037:Artificial Intelligence 1033:"DA2 merging operators" 943:10.1093/logcom/12.5.773 1012:Cite journal requires 219:) is equivalent to f(P 127:propositional formulas 824:"Logic Based Merging" 744:10.1145/153850.153857 637:10.1145/176567.176571 493:Judgement aggregation 422:. They show that the 477:Other related fields 397:polynomial hierarchy 70:first-order theories 1384:10.1007/11518655_44 1336:. Springer Nature. 544:. Morgan Kaufmann. 483:social epistemology 171:logical conjunction 45:multi-agent systems 1342:20.500.12657/60149 1115:Information Fusion 512:Belief aggregation 471:Multiwinner voting 207:is equivalent to c 1496: 1495: 1479:adding categories 1393:978-3-540-31888-0 1351:978-3-031-09016-5 1275:978-1-61499-671-2 1230:978-3-030-19570-0 1177:10.1613/jair.2034 1095:978-3-540-44652-1 911:978-3-540-48747-0 793:10.1109/69.667090 753:978-0-89791-593-9 551:978-1-55860-216-8 420:strategyproofness 387:, refined by the 1515: 1491: 1488: 1482: 1459: 1451: 1445: 1444: 1404: 1398: 1397: 1377: 1362: 1356: 1355: 1327: 1321: 1320: 1310: 1301:(3): 2822–2829. 1286: 1280: 1279: 1249: 1243: 1242: 1204: 1198: 1197: 1179: 1169: 1145: 1139: 1138: 1106: 1100: 1099: 1069: 1063: 1062: 1052: 1028: 1022: 1021: 1015: 1010: 1008: 1000: 992: 986: 985: 953: 947: 946: 922: 916: 915: 885: 879: 878: 866: 860: 859: 819: 813: 812: 772: 766: 765: 727: 721: 720: 709:10.1109/69.88001 688: 682: 681: 679: 678: 664: 658: 657: 639: 615: 606: 605: 565: 556: 555: 535: 489:Group consensus; 385:egalitarian rule 367:utilitarian rule 359:Hamming distance 115:merging operator 74:annotated logics 29:logical formulae 1523: 1522: 1518: 1517: 1516: 1514: 1513: 1512: 1498: 1497: 1492: 1486: 1483: 1472: 1460: 1449: 1448: 1406: 1405: 1401: 1394: 1375: 1364: 1363: 1359: 1352: 1329: 1328: 1324: 1288: 1287: 1283: 1276: 1251: 1250: 1246: 1231: 1206: 1205: 1201: 1147: 1146: 1142: 1108: 1107: 1103: 1096: 1071: 1070: 1066: 1030: 1029: 1025: 1011: 1001: 994: 993: 989: 955: 954: 950: 924: 923: 919: 912: 887: 886: 882: 868: 867: 863: 821: 820: 816: 774: 773: 769: 754: 729: 728: 724: 690: 689: 685: 676: 674: 666: 665: 661: 617: 616: 609: 567: 566: 559: 552: 537: 536: 532: 527: 506:Belief revision 502: 479: 405: 381: 374:interpretations 364: 355: 348:interpretations 337: 333: 329: 325: 318: 314: 310: 306: 299: 295: 291: 287: 280: 276: 272: 268: 261: 257: 253: 249: 245: 241: 237: 233: 226: 222: 218: 214: 210: 206: 202: 194: 185: 179: 141: 135: 94: 82: 58: 53: 12: 11: 5: 1521: 1519: 1511: 1510: 1500: 1499: 1494: 1493: 1463: 1461: 1454: 1447: 1446: 1419:(2): 285–298. 1399: 1392: 1357: 1350: 1322: 1281: 1274: 1244: 1229: 1199: 1140: 1101: 1094: 1064: 1023: 1014:|journal= 987: 968:(3): 785–802. 948: 937:(5): 773–808. 917: 910: 880: 861: 834:(2): 239–270. 814: 767: 752: 722: 703:(2): 208–220. 683: 659: 630:(2): 291–331. 607: 557: 550: 529: 528: 526: 523: 522: 521: 515: 509: 501: 498: 497: 496: 490: 478: 475: 468: 467: 460: 456: 404: 401: 393: 392: 379: 370: 362: 353: 340: 339: 335: 331: 327: 323: 320: 316: 312: 308: 304: 301: 300:,c) models it. 297: 293: 289: 285: 282: 278: 274: 273:,c) models f(P 270: 266: 263: 262:is consistent. 259: 255: 251: 247: 243: 239: 235: 234:models c and p 231: 228: 224: 220: 216: 212: 208: 204: 200: 192: 189: 183: 177: 167: 160: 139: 133: 117:is a function 110: 109: 105: 93: 90: 81: 78: 57: 54: 52: 49: 19:, also called 17:Belief merging 13: 10: 9: 6: 4: 3: 2: 1520: 1509: 1506: 1505: 1503: 1490: 1487:November 2023 1480: 1476: 1470: 1469: 1464:This article 1462: 1458: 1453: 1452: 1442: 1438: 1434: 1430: 1426: 1422: 1418: 1414: 1410: 1403: 1400: 1395: 1389: 1385: 1381: 1374: 1373: 1368: 1361: 1358: 1353: 1347: 1343: 1339: 1335: 1334: 1326: 1323: 1318: 1314: 1309: 1304: 1300: 1296: 1292: 1285: 1282: 1277: 1271: 1267: 1263: 1259: 1255: 1248: 1245: 1240: 1236: 1232: 1226: 1222: 1218: 1214: 1210: 1203: 1200: 1195: 1191: 1187: 1183: 1178: 1173: 1168: 1163: 1159: 1155: 1151: 1144: 1141: 1136: 1132: 1128: 1124: 1120: 1116: 1112: 1105: 1102: 1097: 1091: 1087: 1083: 1079: 1075: 1068: 1065: 1060: 1056: 1051: 1046: 1042: 1038: 1034: 1027: 1024: 1019: 1006: 998: 991: 988: 983: 979: 975: 971: 967: 963: 959: 952: 949: 944: 940: 936: 932: 928: 921: 918: 913: 907: 903: 899: 895: 891: 884: 881: 876: 872: 865: 862: 857: 853: 849: 845: 841: 837: 833: 829: 825: 818: 815: 810: 806: 802: 798: 794: 790: 786: 782: 778: 771: 768: 763: 759: 755: 749: 745: 741: 737: 733: 726: 723: 718: 714: 710: 706: 702: 698: 694: 687: 684: 673: 669: 663: 660: 655: 651: 647: 643: 638: 633: 629: 625: 621: 614: 612: 608: 603: 599: 595: 591: 587: 583: 579: 575: 571: 564: 562: 558: 553: 547: 543: 542: 534: 531: 524: 519: 518:Sensor fusion 516: 513: 510: 507: 504: 503: 499: 494: 491: 488: 487: 486: 484: 476: 474: 472: 465: 461: 457: 454: 453: 452: 450: 445: 442: 439: 435: 433: 429: 425: 421: 416: 414: 410: 409:social choice 402: 400: 398: 390: 389:leximin order 386: 382: 375: 371: 368: 360: 356: 349: 345: 344: 343: 321: 302: 283: 264: 229: 198: 190: 187: 176: 172: 168: 165: 162:IC1: If c is 161: 158: 154: 153: 152: 150: 146: 142: 132: 128: 124: 120: 116: 106: 103: 102: 101: 99: 91: 89: 87: 79: 77: 75: 71: 67: 63: 55: 50: 48: 46: 42: 41:expert system 38: 34: 33:sensor fusion 30: 26: 22: 21:belief fusion 18: 1484: 1465: 1416: 1412: 1402: 1371: 1360: 1332: 1325: 1298: 1294: 1284: 1257: 1247: 1212: 1202: 1157: 1153: 1143: 1121:(1): 61–79. 1118: 1114: 1104: 1077: 1067: 1043:(1): 49–79. 1040: 1036: 1026: 1005:cite journal 990: 965: 961: 951: 934: 930: 920: 893: 883: 874: 864: 831: 827: 817: 787:(1): 76–90. 784: 780: 770: 735: 725: 700: 696: 686: 675:. Retrieved 671: 662: 627: 623: 580:(1): 45–71. 577: 573: 540: 533: 480: 469: 446: 443: 440: 436: 431: 417: 406: 394: 377: 351: 341: 338:) models it. 181: 174: 169:IC2: If the 155:IC0: f(P,c) 148: 144: 137: 130: 122: 118: 114: 111: 97: 95: 85: 83: 73: 61: 59: 39:to build an 24: 20: 16: 15: 672:Guide books 485:, such as: 459:population. 288:,c) and f(P 269:,c) and f(P 86:arbitration 80:Arbitration 62:combination 56:Combination 1468:categories 1160:: 49–105. 677:2023-11-13 525:References 211:, then f(P 197:equivalent 164:consistent 51:Approaches 1433:1573-0964 1317:2374-3468 1239:146807947 1186:1076-9757 1167:1110.2766 1135:1566-2535 1059:0004-3702 982:0377-2217 848:1573-0433 801:1041-4347 717:1041-4347 646:0362-5915 594:0824-7935 413:elections 258:,c) and p 246:,c) and p 230:IC4: if p 191:IC3: if P 37:databases 1502:Category 1475:help out 1441:18001376 1413:Synthese 654:15968948 500:See also 108:experts. 1473:Please 1194:2559616 856:1458423 809:5672503 762:2627403 376:of the 350:of the 326:) and c 307:) and c 159:c. 98:merging 92:Merging 84:In the 60:In the 1508:Belief 1439:  1431:  1390:  1348:  1315:  1272:  1237:  1227:  1192:  1184:  1133:  1092:  1057:  980:  908:  854:  846:  807:  799:  760:  750:  715:  652:  644:  602:964506 600:  592:  548:  157:models 1437:S2CID 1376:(PDF) 1235:S2CID 1190:S2CID 1162:arXiv 852:S2CID 805:S2CID 758:S2CID 650:S2CID 598:S2CID 334:and c 315:and c 203:and c 180:,..., 136:,..., 129:, P=( 66:Kraus 1429:ISSN 1388:ISBN 1346:ISBN 1313:ISSN 1270:ISBN 1225:ISBN 1182:ISSN 1131:ISSN 1090:ISBN 1055:ISSN 1018:help 978:ISSN 906:ISBN 844:ISSN 797:ISSN 748:ISBN 713:ISSN 642:ISSN 590:ISSN 546:ISBN 426:and 281:,c). 199:to P 96:The 1477:by 1421:doi 1417:152 1380:doi 1338:hdl 1303:doi 1262:doi 1217:doi 1172:doi 1123:doi 1082:doi 1045:doi 1041:157 970:doi 966:160 939:doi 898:doi 836:doi 789:doi 740:doi 705:doi 632:doi 582:doi 432:not 430:do 227:). 195:is 173:of 23:or 1504:: 1435:. 1427:. 1415:. 1411:. 1386:. 1344:. 1311:. 1299:34 1297:. 1293:. 1268:. 1256:. 1233:. 1223:. 1188:. 1180:. 1170:. 1158:28 1156:. 1152:. 1129:. 1113:. 1088:. 1053:. 1035:. 1009:: 1007:}} 1003:{{ 976:. 960:. 935:12 933:. 929:. 904:. 873:. 850:. 842:. 832:40 830:. 826:. 803:. 795:. 785:10 783:. 779:. 756:. 746:. 734:. 711:. 699:. 695:. 670:. 648:. 640:. 628:19 626:. 622:. 610:^ 596:. 588:. 576:. 572:. 560:^ 399:. 319:). 296:+P 277:+P 254:,p 242:,p 223:,c 215:,c 184:n, 47:. 1489:) 1485:( 1471:. 1443:. 1423:: 1396:. 1382:: 1354:. 1340:: 1319:. 1305:: 1278:. 1264:: 1241:. 1219:: 1196:. 1174:: 1164:: 1137:. 1125:: 1119:7 1098:. 1084:: 1061:. 1047:: 1020:) 1016:( 999:. 984:. 972:: 945:. 941:: 914:. 900:: 858:. 838:: 811:. 791:: 764:. 742:: 719:. 707:: 701:3 680:. 656:. 634:: 604:. 584:: 578:8 554:. 391:. 380:i 378:p 369:. 363:i 354:i 352:p 336:2 332:1 328:2 324:1 317:2 313:1 309:2 305:1 298:2 294:1 290:2 286:1 279:2 275:1 271:2 267:1 260:2 256:2 252:1 248:1 244:2 240:1 236:2 232:1 225:2 221:2 217:1 213:1 209:2 205:1 201:2 193:1 186:c 182:p 178:1 175:p 149:c 145:n 140:n 138:p 134:1 131:p 123:n 119:f

Index

logical formulae
sensor fusion
databases
expert system
multi-agent systems
Kraus
first-order theories
propositional formulas
models
consistent
logical conjunction
equivalent
interpretations
Hamming distance
utilitarian rule
interpretations
egalitarian rule
leximin order
polynomial hierarchy
social choice
elections
strategyproofness
Arrow's impossibility theorem
Gibbard–Satterthwaite theorem
justified representation
Proportional approval voting
Multiwinner voting
social epistemology
Judgement aggregation
Belief revision

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