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Profunctor

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1746: 1344: 2099: 234: 1080: 541: 1618: 1407: 732: 2383: 1932: 653: 385: 2487: 1829: 2221: 1158:, where each member of the relation is associated with a set of morphisms. A functor is a special case of a profunctor in the same way that a function is a special case of a relation. 1987: 2270: 2333: 1491: 1254: 1222: 1113: 869: 457: 166: 269: 1629: 829: 1440: 576: 321: 1187: 685: 2301: 2439: 2182: 88: 1769: 600: 411: 2407: 1869: 1849: 1551: 1531: 1511: 1156: 1136: 1029: 1009: 989: 969: 949: 929: 909: 889: 803: 783: 756: 293: 131: 111: 1265: 2002: 17: 61: 181: 1038: 1556: 1352: 462: 690: 2109:
Composition of profunctors is associative only up to isomorphism (because the product is not strictly associative in
2338: 608: 2444: 2187: 2229: 2306: 1448: 1227: 1195: 1085: 842: 579: 139: 1877: 1937: 1741:{\displaystyle (\psi \phi )(e,c)=\left(\coprod _{d\in D}\psi (e,d)\times \phi (d,c)\right){\Bigg /}\sim } 330: 1774: 735: 242: 416: 808: 547: 173: 1416: 553: 298: 1118:
This also makes it clear that a profunctor can be thought of as a relation between the objects of
2516: 1169: 661: 2279: 2135: 1730: 91: 2412: 2155: 1994: 72: 1754: 585: 8: 2539: 390: 2392: 1854: 1834: 1536: 1516: 1496: 1141: 1121: 1014: 994: 974: 954: 934: 914: 894: 874: 788: 768: 741: 278: 116: 96: 2582: 1339:{\displaystyle \psi \phi =\mathrm {Lan} _{Y_{D}}({\hat {\psi }})\circ {\hat {\phi }}} 1031:. (These are also known as het-sets, since the corresponding morphisms can be called 272: 2386: 324: 2131:
1-cells between two small categories are the profunctors between those categories,
1035:.) The previous definition can be recovered by the restriction of the hom-functor 40: 28: 2512: 2559: 2125: 1443: 2094:{\displaystyle (\psi \phi )(e,c)=\int ^{d\colon D}\psi (e,d)\times \phi (d,c)} 991:. The sets in the formal definition above are the hom-sets between objects of 2576: 1410: 2547: 32: 2303:
has a right adjoint. Moreover, this is a characterization: a profunctor
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is a category whose objects are the disjoint union of the objects of
44: 229:{\displaystyle \phi :D^{\mathrm {op} }\times C\to \mathbf {Set} } 1075:{\displaystyle \phi ^{\text{op}}\times \phi \to \mathbf {Set} } 1993:
Equivalently, profunctor composition can be written using a
2563: 2551: 1613:{\displaystyle D(-,d):D^{\mathrm {op} }\to \mathrm {Set} } 951:, plus zero or more additional morphisms from objects of 1402:{\displaystyle \mathrm {Lan} _{Y_{D}}({\hat {\psi }})} 2447: 2415: 2395: 2341: 2309: 2282: 2232: 2190: 2158: 2005: 1940: 1880: 1857: 1837: 1777: 1757: 1632: 1559: 1539: 1519: 1499: 1451: 1419: 1355: 1268: 1230: 1198: 1172: 1144: 1124: 1088: 1041: 1017: 997: 977: 957: 937: 917: 897: 877: 845: 811: 791: 771: 744: 693: 664: 611: 588: 556: 465: 419: 393: 333: 301: 281: 245: 184: 142: 119: 99: 75: 536:{\displaystyle xf\in \phi (d,c),gx\in \phi (d',c')} 2481: 2433: 2401: 2377: 2327: 2295: 2264: 2215: 2176: 2147: 2093: 1981: 1926: 1863: 1843: 1823: 1763: 1740: 1612: 1545: 1525: 1505: 1485: 1434: 1401: 1338: 1248: 1216: 1181: 1150: 1130: 1107: 1074: 1023: 1003: 983: 963: 943: 923: 903: 883: 863: 823: 797: 777: 750: 727:{\displaystyle \mathrm {Set} ^{D^{\mathrm {op} }}} 726: 679: 647: 594: 570: 535: 451: 405: 379: 315: 287: 263: 228: 160: 125: 105: 82: 2113:). The best one can hope is therefore to build a 2574: 2378:{\displaystyle {\hat {\phi }}:C\to {\hat {D}}} 648:{\displaystyle {\hat {\phi }}:C\to {\hat {D}}} 1161: 2104: 1771:is the least equivalence relation such that 834: 2482:{\displaystyle {\hat {\phi }}=Y_{D}\circ F} 911:, and whose morphisms are the morphisms of 2223:by postcomposing with the Yoneda functor: 2216:{\displaystyle \phi _{F}:C\nrightarrow D} 839:An equivalent definition of a profunctor 76: 2134:2-cells between two profunctors are the 2527: 2511: 2276:It can be shown that such a profunctor 14: 2575: 2265:{\displaystyle \phi _{F}=Y_{D}\circ F} 2536: 2328:{\displaystyle \phi :C\nrightarrow D} 1486:{\displaystyle Y_{D}:D\to {\hat {D}}} 1249:{\displaystyle \psi :D\nrightarrow E} 1217:{\displaystyle \phi :C\nrightarrow D} 1108:{\displaystyle D^{\text{op}}\times C} 864:{\displaystyle \phi :C\nrightarrow D} 161:{\displaystyle \phi :C\nrightarrow D} 1927:{\displaystyle y'=vy\in \psi (e,d')} 2335:has a right adjoint if and only if 1982:{\displaystyle x'v=x\in \phi (d,c)} 380:{\displaystyle f:d\to d',g:c\to c'} 24: 1606: 1603: 1600: 1590: 1587: 1364: 1361: 1358: 1286: 1283: 1280: 716: 713: 702: 699: 696: 255: 252: 200: 197: 25: 2594: 1831:whenever there exists a morphism 1824:{\displaystyle (y',x')\sim (y,x)} 264:{\displaystyle D^{\mathrm {op} }} 1068: 1065: 1062: 564: 561: 558: 452:{\displaystyle x\in \phi (d',c)} 309: 306: 303: 222: 219: 216: 18:Correspondence (category theory) 2530:Handbook of Categorical Algebra 2148:Lifting functors to profunctors 824:{\displaystyle D\nrightarrow C} 2454: 2425: 2409:, i.e. there exists a functor 2369: 2360: 2348: 2168: 2088: 2076: 2067: 2055: 2030: 2018: 2015: 2006: 1976: 1964: 1921: 1904: 1818: 1806: 1800: 1778: 1720: 1708: 1699: 1687: 1657: 1645: 1642: 1633: 1596: 1575: 1563: 1477: 1468: 1435:{\displaystyle {\hat {\psi }}} 1426: 1396: 1390: 1381: 1330: 1318: 1312: 1303: 1058: 671: 639: 630: 618: 571:{\displaystyle \mathbf {Cat} } 530: 508: 490: 478: 446: 429: 366: 343: 316:{\displaystyle \mathbf {Set} } 212: 13: 1: 2543:. Princeton University Press. 2504: 2142: 50: 2184:can be seen as a profunctor 580:category of small categories 7: 2492: 10: 2599: 2138:between those profunctors. 1182:{\displaystyle \psi \phi } 1162:Composition of profunctors 680:{\displaystyle {\hat {D}}} 2528:Borceux, Francis (1994). 2296:{\displaystyle \phi _{F}} 2105:Bicategory of profunctors 835:Profunctors as categories 602:can be seen as a functor 65:by the French school and 2434:{\displaystyle F:C\to D} 2177:{\displaystyle F:C\to D} 39:are a generalization of 2136:natural transformations 1553:associates the functor 1513:(which to every object 543:to denote the actions. 83:{\displaystyle \,\phi } 2483: 2435: 2403: 2379: 2329: 2297: 2266: 2217: 2178: 2095: 1983: 1928: 1865: 1845: 1825: 1765: 1742: 1614: 1547: 1527: 1507: 1487: 1436: 1403: 1340: 1250: 1218: 1183: 1152: 1132: 1109: 1076: 1025: 1005: 985: 965: 945: 925: 905: 885: 865: 825: 799: 779: 752: 728: 681: 649: 596: 572: 537: 453: 407: 381: 317: 289: 265: 230: 162: 127: 107: 84: 69:by the Sydney school) 2537:Lurie, Jacob (2009). 2484: 2436: 2404: 2380: 2330: 2298: 2267: 2218: 2179: 2096: 1984: 1929: 1866: 1846: 1826: 1766: 1764:{\displaystyle \sim } 1743: 1623:It can be shown that 1615: 1548: 1528: 1508: 1488: 1437: 1404: 1341: 1251: 1219: 1184: 1153: 1133: 1110: 1077: 1026: 1006: 986: 966: 946: 931:and the morphisms of 926: 906: 886: 866: 826: 800: 780: 753: 729: 687:denotes the category 682: 650: 597: 595:{\displaystyle \phi } 573: 538: 454: 408: 382: 318: 290: 266: 231: 163: 128: 108: 85: 2518:Distributors at Work 2445: 2413: 2393: 2385:factors through the 2339: 2307: 2280: 2230: 2188: 2156: 2003: 1938: 1878: 1855: 1835: 1775: 1755: 1630: 1557: 1537: 1517: 1497: 1449: 1417: 1353: 1266: 1228: 1196: 1170: 1142: 1122: 1086: 1039: 1015: 995: 975: 955: 935: 915: 895: 875: 843: 809: 789: 769: 742: 691: 662: 609: 586: 554: 463: 417: 391: 331: 299: 279: 243: 182: 140: 117: 97: 73: 2540:Higher Topos Theory 1189:of two profunctors 1138:and the objects of 891:and the objects of 406:{\displaystyle D,C} 172:is defined to be a 2479: 2431: 2399: 2375: 2325: 2293: 2262: 2213: 2174: 2091: 1979: 1924: 1861: 1841: 1821: 1761: 1738: 1683: 1610: 1543: 1523: 1503: 1483: 1432: 1399: 1336: 1246: 1214: 1179: 1148: 1128: 1105: 1072: 1021: 1001: 981: 961: 941: 921: 901: 881: 861: 821: 795: 775: 748: 724: 677: 645: 592: 568: 533: 449: 403: 377: 327:. Given morphisms 313: 285: 261: 226: 158: 123: 103: 80: 2457: 2402:{\displaystyle D} 2387:Cauchy completion 2372: 2351: 1864:{\displaystyle D} 1844:{\displaystyle v} 1668: 1546:{\displaystyle D} 1526:{\displaystyle d} 1506:{\displaystyle D} 1480: 1429: 1393: 1333: 1315: 1151:{\displaystyle D} 1131:{\displaystyle C} 1096: 1049: 1024:{\displaystyle C} 1004:{\displaystyle D} 984:{\displaystyle C} 964:{\displaystyle D} 944:{\displaystyle D} 924:{\displaystyle C} 904:{\displaystyle D} 884:{\displaystyle C} 798:{\displaystyle D} 778:{\displaystyle C} 751:{\displaystyle D} 674: 642: 621: 582:, the profunctor 548:cartesian closure 288:{\displaystyle D} 273:opposite category 126:{\displaystyle D} 106:{\displaystyle C} 16:(Redirected from 2590: 2544: 2533: 2524: 2523: 2488: 2486: 2485: 2480: 2472: 2471: 2459: 2458: 2450: 2440: 2438: 2437: 2432: 2408: 2406: 2405: 2400: 2384: 2382: 2381: 2376: 2374: 2373: 2365: 2353: 2352: 2344: 2334: 2332: 2331: 2326: 2302: 2300: 2299: 2294: 2292: 2291: 2271: 2269: 2268: 2263: 2255: 2254: 2242: 2241: 2222: 2220: 2219: 2214: 2200: 2199: 2183: 2181: 2180: 2175: 2126:small categories 2100: 2098: 2097: 2092: 2051: 2050: 1988: 1986: 1985: 1980: 1948: 1933: 1931: 1930: 1925: 1920: 1888: 1870: 1868: 1867: 1862: 1850: 1848: 1847: 1842: 1830: 1828: 1827: 1822: 1799: 1788: 1770: 1768: 1767: 1762: 1747: 1745: 1744: 1739: 1734: 1733: 1727: 1723: 1682: 1619: 1617: 1616: 1611: 1609: 1595: 1594: 1593: 1552: 1550: 1549: 1544: 1532: 1530: 1529: 1524: 1512: 1510: 1509: 1504: 1492: 1490: 1489: 1484: 1482: 1481: 1473: 1461: 1460: 1441: 1439: 1438: 1433: 1431: 1430: 1422: 1408: 1406: 1405: 1400: 1395: 1394: 1386: 1380: 1379: 1378: 1377: 1367: 1345: 1343: 1342: 1337: 1335: 1334: 1326: 1317: 1316: 1308: 1302: 1301: 1300: 1299: 1289: 1255: 1253: 1252: 1247: 1223: 1221: 1220: 1215: 1188: 1186: 1185: 1180: 1157: 1155: 1154: 1149: 1137: 1135: 1134: 1129: 1114: 1112: 1111: 1106: 1098: 1097: 1094: 1081: 1079: 1078: 1073: 1071: 1051: 1050: 1047: 1030: 1028: 1027: 1022: 1010: 1008: 1007: 1002: 990: 988: 987: 982: 970: 968: 967: 962: 950: 948: 947: 942: 930: 928: 927: 922: 910: 908: 907: 902: 890: 888: 887: 882: 870: 868: 867: 862: 830: 828: 827: 822: 805:is a profunctor 804: 802: 801: 796: 784: 782: 781: 776: 757: 755: 754: 749: 733: 731: 730: 725: 723: 722: 721: 720: 719: 705: 686: 684: 683: 678: 676: 675: 667: 654: 652: 651: 646: 644: 643: 635: 623: 622: 614: 601: 599: 598: 593: 577: 575: 574: 569: 567: 542: 540: 539: 534: 529: 518: 458: 456: 455: 450: 439: 412: 410: 409: 404: 387:respectively in 386: 384: 383: 378: 376: 353: 325:category of sets 322: 320: 319: 314: 312: 294: 292: 291: 286: 270: 268: 267: 262: 260: 259: 258: 235: 233: 232: 227: 225: 205: 204: 203: 167: 165: 164: 159: 132: 130: 129: 124: 112: 110: 109: 104: 89: 87: 86: 81: 21: 2598: 2597: 2593: 2592: 2591: 2589: 2588: 2587: 2573: 2572: 2571: 2521: 2507: 2495: 2467: 2463: 2449: 2448: 2446: 2443: 2442: 2414: 2411: 2410: 2394: 2391: 2390: 2364: 2363: 2343: 2342: 2340: 2337: 2336: 2308: 2305: 2304: 2287: 2283: 2281: 2278: 2277: 2250: 2246: 2237: 2233: 2231: 2228: 2227: 2195: 2191: 2189: 2186: 2185: 2157: 2154: 2153: 2150: 2145: 2107: 2040: 2036: 2004: 2001: 2000: 1941: 1939: 1936: 1935: 1913: 1881: 1879: 1876: 1875: 1856: 1853: 1852: 1836: 1833: 1832: 1792: 1781: 1776: 1773: 1772: 1756: 1753: 1752: 1729: 1728: 1672: 1667: 1663: 1631: 1628: 1627: 1599: 1586: 1585: 1581: 1558: 1555: 1554: 1538: 1535: 1534: 1518: 1515: 1514: 1498: 1495: 1494: 1472: 1471: 1456: 1452: 1450: 1447: 1446: 1421: 1420: 1418: 1415: 1414: 1413:of the functor 1385: 1384: 1373: 1369: 1368: 1357: 1356: 1354: 1351: 1350: 1325: 1324: 1307: 1306: 1295: 1291: 1290: 1279: 1278: 1267: 1264: 1263: 1229: 1226: 1225: 1197: 1194: 1193: 1171: 1168: 1167: 1164: 1143: 1140: 1139: 1123: 1120: 1119: 1093: 1089: 1087: 1084: 1083: 1061: 1046: 1042: 1040: 1037: 1036: 1033:heteromorphisms 1016: 1013: 1012: 1011:and objects of 996: 993: 992: 976: 973: 972: 956: 953: 952: 936: 933: 932: 916: 913: 912: 896: 893: 892: 876: 873: 872: 844: 841: 840: 837: 810: 807: 806: 790: 787: 786: 770: 767: 766: 743: 740: 739: 712: 711: 707: 706: 695: 694: 692: 689: 688: 666: 665: 663: 660: 659: 634: 633: 613: 612: 610: 607: 606: 587: 584: 583: 557: 555: 552: 551: 522: 511: 464: 461: 460: 432: 418: 415: 414: 413:and an element 392: 389: 388: 369: 346: 332: 329: 328: 302: 300: 297: 296: 280: 277: 276: 251: 250: 246: 244: 241: 240: 215: 196: 195: 191: 183: 180: 179: 141: 138: 137: 118: 115: 114: 98: 95: 94: 74: 71: 70: 53: 29:category theory 23: 22: 15: 12: 11: 5: 2596: 2586: 2585: 2570: 2569: 2560:Heteromorphism 2557: 2545: 2534: 2525: 2508: 2506: 2503: 2502: 2501: 2494: 2491: 2478: 2475: 2470: 2466: 2462: 2456: 2453: 2430: 2427: 2424: 2421: 2418: 2398: 2371: 2368: 2362: 2359: 2356: 2350: 2347: 2324: 2321: 2318: 2315: 2312: 2290: 2286: 2274: 2273: 2261: 2258: 2253: 2249: 2245: 2240: 2236: 2212: 2209: 2206: 2203: 2198: 2194: 2173: 2170: 2167: 2164: 2161: 2149: 2146: 2144: 2141: 2140: 2139: 2132: 2129: 2106: 2103: 2102: 2101: 2090: 2087: 2084: 2081: 2078: 2075: 2072: 2069: 2066: 2063: 2060: 2057: 2054: 2049: 2046: 2043: 2039: 2035: 2032: 2029: 2026: 2023: 2020: 2017: 2014: 2011: 2008: 1991: 1990: 1978: 1975: 1972: 1969: 1966: 1963: 1960: 1957: 1954: 1951: 1947: 1944: 1923: 1919: 1916: 1912: 1909: 1906: 1903: 1900: 1897: 1894: 1891: 1887: 1884: 1860: 1840: 1820: 1817: 1814: 1811: 1808: 1805: 1802: 1798: 1795: 1791: 1787: 1784: 1780: 1760: 1749: 1748: 1737: 1732: 1726: 1722: 1719: 1716: 1713: 1710: 1707: 1704: 1701: 1698: 1695: 1692: 1689: 1686: 1681: 1678: 1675: 1671: 1666: 1662: 1659: 1656: 1653: 1650: 1647: 1644: 1641: 1638: 1635: 1608: 1605: 1602: 1598: 1592: 1589: 1584: 1580: 1577: 1574: 1571: 1568: 1565: 1562: 1542: 1522: 1502: 1479: 1476: 1470: 1467: 1464: 1459: 1455: 1444:Yoneda functor 1428: 1425: 1398: 1392: 1389: 1383: 1376: 1372: 1366: 1363: 1360: 1347: 1346: 1332: 1329: 1323: 1320: 1314: 1311: 1305: 1298: 1294: 1288: 1285: 1282: 1277: 1274: 1271: 1257: 1256: 1245: 1242: 1239: 1236: 1233: 1213: 1210: 1207: 1204: 1201: 1178: 1175: 1166:The composite 1163: 1160: 1147: 1127: 1104: 1101: 1092: 1070: 1067: 1064: 1060: 1057: 1054: 1045: 1020: 1000: 980: 971:to objects of 960: 940: 920: 900: 880: 860: 857: 854: 851: 848: 836: 833: 820: 817: 814: 794: 774: 763:correspondence 747: 718: 715: 710: 704: 701: 698: 673: 670: 656: 655: 641: 638: 632: 629: 626: 620: 617: 591: 566: 563: 560: 532: 528: 525: 521: 517: 514: 510: 507: 504: 501: 498: 495: 492: 489: 486: 483: 480: 477: 474: 471: 468: 448: 445: 442: 438: 435: 431: 428: 425: 422: 402: 399: 396: 375: 372: 368: 365: 362: 359: 356: 352: 349: 345: 342: 339: 336: 311: 308: 305: 284: 257: 254: 249: 237: 236: 224: 221: 218: 214: 211: 208: 202: 199: 194: 190: 187: 170: 169: 157: 154: 151: 148: 145: 122: 113:to a category 102: 79: 52: 49: 31:, a branch of 9: 6: 4: 3: 2: 2595: 2584: 2581: 2580: 2578: 2568: 2566: 2561: 2558: 2556: 2554: 2549: 2546: 2542: 2541: 2535: 2531: 2526: 2520: 2519: 2514: 2513:BĂ©nabou, Jean 2510: 2509: 2500: 2497: 2496: 2490: 2476: 2473: 2468: 2464: 2460: 2451: 2428: 2422: 2419: 2416: 2396: 2388: 2366: 2357: 2354: 2345: 2322: 2319: 2316: 2313: 2310: 2288: 2284: 2259: 2256: 2251: 2247: 2243: 2238: 2234: 2226: 2225: 2224: 2210: 2207: 2204: 2201: 2196: 2192: 2171: 2165: 2162: 2159: 2137: 2133: 2130: 2127: 2123: 2122: 2121: 2119: 2116: 2112: 2085: 2082: 2079: 2073: 2070: 2064: 2061: 2058: 2052: 2047: 2044: 2041: 2037: 2033: 2027: 2024: 2021: 2012: 2009: 1999: 1998: 1997: 1996: 1973: 1970: 1967: 1961: 1958: 1955: 1952: 1949: 1945: 1942: 1917: 1914: 1910: 1907: 1901: 1898: 1895: 1892: 1889: 1885: 1882: 1874: 1873: 1872: 1858: 1838: 1815: 1812: 1809: 1803: 1796: 1793: 1789: 1785: 1782: 1758: 1735: 1724: 1717: 1714: 1711: 1705: 1702: 1696: 1693: 1690: 1684: 1679: 1676: 1673: 1669: 1664: 1660: 1654: 1651: 1648: 1639: 1636: 1626: 1625: 1624: 1621: 1582: 1578: 1572: 1569: 1566: 1560: 1540: 1520: 1500: 1474: 1465: 1462: 1457: 1453: 1445: 1423: 1412: 1411:Kan extension 1387: 1374: 1370: 1327: 1321: 1309: 1296: 1292: 1275: 1272: 1269: 1262: 1261: 1260: 1243: 1240: 1237: 1234: 1231: 1211: 1208: 1205: 1202: 1199: 1192: 1191: 1190: 1176: 1173: 1159: 1145: 1125: 1116: 1102: 1099: 1090: 1055: 1052: 1043: 1034: 1018: 998: 978: 958: 938: 918: 898: 878: 858: 855: 852: 849: 846: 832: 818: 815: 812: 792: 772: 764: 759: 745: 737: 708: 668: 636: 627: 624: 615: 605: 604: 603: 589: 581: 549: 544: 526: 523: 519: 515: 512: 505: 502: 499: 496: 493: 487: 484: 481: 475: 472: 469: 466: 443: 440: 436: 433: 426: 423: 420: 400: 397: 394: 373: 370: 363: 360: 357: 354: 350: 347: 340: 337: 334: 326: 282: 274: 247: 209: 206: 192: 188: 185: 178: 177: 176: 175: 155: 152: 149: 146: 143: 136: 135: 134: 120: 100: 93: 77: 68: 64: 63: 58: 48: 46: 42: 38: 34: 30: 19: 2564: 2552: 2538: 2529: 2517: 2275: 2151: 2124:0-cells are 2117: 2110: 2108: 1992: 1750: 1622: 1409:is the left 1348: 1259:is given by 1258: 1165: 1117: 1032: 838: 762: 760: 657: 545: 323:denotes the 271:denotes the 238: 171: 66: 60: 59:(also named 56: 54: 43:and also of 36: 26: 459:, we write 62:distributor 37:profunctors 33:mathematics 2548:Profunctor 2505:References 2499:Anafunctor 2441:such that 2152:A functor 2143:Properties 2115:bicategory 1871:such that 1442:along the 736:presheaves 546:Using the 133:, written 57:profunctor 51:Definition 2474:∘ 2455:^ 2452:ϕ 2426:→ 2370:^ 2361:→ 2349:^ 2346:ϕ 2320:↛ 2311:ϕ 2285:ϕ 2257:∘ 2235:ϕ 2208:↛ 2193:ϕ 2169:→ 2074:ϕ 2071:× 2053:ψ 2045:: 2038:∫ 2013:ϕ 2010:ψ 1962:ϕ 1959:∈ 1902:ψ 1899:∈ 1804:∼ 1759:∼ 1736:∼ 1706:ϕ 1703:× 1685:ψ 1677:∈ 1670:∐ 1640:ϕ 1637:ψ 1597:→ 1567:− 1478:^ 1469:→ 1427:^ 1424:ψ 1391:^ 1388:ψ 1331:^ 1328:ϕ 1322:∘ 1313:^ 1310:ψ 1273:ϕ 1270:ψ 1241:↛ 1232:ψ 1209:↛ 1200:ϕ 1177:ϕ 1174:ψ 1100:× 1059:→ 1056:ϕ 1053:× 1044:ϕ 856:↛ 847:ϕ 816:↛ 672:^ 640:^ 631:→ 619:^ 616:ϕ 590:ϕ 506:ϕ 503:∈ 476:ϕ 473:∈ 427:ϕ 424:∈ 367:→ 344:→ 213:→ 207:× 186:ϕ 153:↛ 144:ϕ 78:ϕ 45:bimodules 41:relations 2583:Functors 2577:Category 2515:(2000), 2493:See also 1946:′ 1918:′ 1886:′ 1797:′ 1786:′ 527:′ 516:′ 437:′ 374:′ 351:′ 92:category 2562:at the 2550:at the 174:functor 90:from a 2532:. CUP. 2120:whose 1751:where 1349:where 658:where 578:, the 239:where 67:module 2522:(PDF) 1995:coend 1934:and 765:from 738:over 2118:Prof 1224:and 295:and 2567:Lab 2555:Lab 2389:of 2111:Set 1851:in 1620:). 1533:of 1493:of 1082:to 785:to 734:of 550:of 275:of 27:In 2579:: 2489:. 1115:. 1095:op 1048:op 831:. 761:A 758:. 55:A 47:. 35:, 2565:n 2553:n 2477:F 2469:D 2465:Y 2461:= 2429:D 2423:C 2420:: 2417:F 2397:D 2367:D 2358:C 2355:: 2323:D 2317:C 2314:: 2289:F 2272:. 2260:F 2252:D 2248:Y 2244:= 2239:F 2211:D 2205:C 2202:: 2197:F 2172:D 2166:C 2163:: 2160:F 2128:, 2089:) 2086:c 2083:, 2080:d 2077:( 2068:) 2065:d 2062:, 2059:e 2056:( 2048:D 2042:d 2034:= 2031:) 2028:c 2025:, 2022:e 2019:( 2016:) 2007:( 1989:. 1977:) 1974:c 1971:, 1968:d 1965:( 1956:x 1953:= 1950:v 1943:x 1922:) 1915:d 1911:, 1908:e 1905:( 1896:y 1893:v 1890:= 1883:y 1859:D 1839:v 1819:) 1816:x 1813:, 1810:y 1807:( 1801:) 1794:x 1790:, 1783:y 1779:( 1731:/ 1725:) 1721:) 1718:c 1715:, 1712:d 1709:( 1700:) 1697:d 1694:, 1691:e 1688:( 1680:D 1674:d 1665:( 1661:= 1658:) 1655:c 1652:, 1649:e 1646:( 1643:) 1634:( 1607:t 1604:e 1601:S 1591:p 1588:o 1583:D 1579:: 1576:) 1573:d 1570:, 1564:( 1561:D 1541:D 1521:d 1501:D 1475:D 1466:D 1463:: 1458:D 1454:Y 1397:) 1382:( 1375:D 1371:Y 1365:n 1362:a 1359:L 1319:) 1304:( 1297:D 1293:Y 1287:n 1284:a 1281:L 1276:= 1244:E 1238:D 1235:: 1212:D 1206:C 1203:: 1146:D 1126:C 1103:C 1091:D 1069:t 1066:e 1063:S 1019:C 999:D 979:C 959:D 939:D 919:C 899:D 879:C 859:D 853:C 850:: 819:C 813:D 793:D 773:C 746:D 717:p 714:o 709:D 703:t 700:e 697:S 669:D 637:D 628:C 625:: 565:t 562:a 559:C 531:) 524:c 520:, 513:d 509:( 500:x 497:g 494:, 491:) 488:c 485:, 482:d 479:( 470:f 467:x 447:) 444:c 441:, 434:d 430:( 421:x 401:C 398:, 395:D 371:c 364:c 361:: 358:g 355:, 348:d 341:d 338:: 335:f 310:t 307:e 304:S 283:D 256:p 253:o 248:D 223:t 220:e 217:S 210:C 201:p 198:o 193:D 189:: 168:, 156:D 150:C 147:: 121:D 101:C 20:)

Index

Correspondence (category theory)
category theory
mathematics
relations
bimodules
distributor
category
functor
opposite category
category of sets
cartesian closure
category of small categories
presheaves
Kan extension
Yoneda functor
coend
bicategory
small categories
natural transformations
Cauchy completion
Anafunctor
BĂ©nabou, Jean
Distributors at Work
Higher Topos Theory
Profunctor
nLab
Heteromorphism
nLab
Category
Functors

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