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| Description: Extend wff definition to
include atomic formulas using the equality
predicate.
(Instead of introducing weq 1100 as an axiomatic statement, as was done
in an older version of this database, we introduce it by
"proving" a
special case of set theory's more general wceq 1099.
This lets us avoid
overloading the |
| Ref | Expression |
|---|---|
| weq |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | wceq 1099 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: ax9 1110 ax9a 1111 a9e 1112 equid 1113 stdpc6 1114 equcomi 1115 equcom 1116 equcoms 1117 equtr 1118 equtrr 1119 equtr2 1120 equequ1 1121 equequ2 1122 elequ1 1123 elequ2 1124 alequcom 1125 alequcoms 1126 nalequcoms 1127 hbae 1128 hbaes 1129 hbnae 1130 hbnaes 1131 equs3 1132 equs4 1133 equsal 1134 equsex 1135 dvelimfALT 1136 dral1 1137 dral2 1138 drex1 1139 drex2 1140 a4at 1141 a4a 1142 a4c 1143 a4c1 1144 cbv1 1145 cbv2 1146 cbv3 1147 cbval 1148 cbvex 1149 chvar 1150 equvini 1151 sbimi 1156 drsb1 1158 sb1 1159 sb2 1160 sbequ1 1161 sbequ2 1162 sbequ12 1164 sbequ12r 1165 sbequ12a 1166 sbid 1167 stdpc4 1168 sbf 1169 sb6x 1171 hbs1f 1172 sbequ5 1173 sbequ6 1174 sbt 1175 equsb1 1176 equsb2 1177 sbied 1178 sbie 1179 equs5a 1181 equs5e 1182 equs45f 1184 sb6f 1185 aev 1192 ax16 1193 ax17eq 1195 ax17el 1196 dveeq2 1197 ax11v2 1199 ax11a2 1200 ax11 1203 ax11b 1204 sb3 1206 sb4 1207 sb4b 1208 dfsb2 1209 dfsb3 1210 hbsb2 1211 sbequi 1212 sbequ 1213 drsb2 1214 sbi1 1216 sbequ8 1231 hbsb4 1232 hbsb4t 1233 dvelimf 1234 dvelimdf 1235 sbco 1236 sbidm 1238 sbco2 1239 sbco3 1241 sbcom 1242 sb5rf 1243 sb6rf 1244 sb9i 1247 ax11v 1249 sb56 1250 sb6 1251 sb5 1252 equid1 1253 a4b1 1254 a4w1 1256 equvin 1257 a16g 1258 a16gb 1259 cbval2 1298 cbvex2 1299 cbvald 1302 cbvexd 1303 cbvex4v 1304 cleljust 1310 equsb3lem 1311 equsb3 1312 elsb3 1313 hbs1 1314 hbsb 1315 sbcom2 1316 2sb5 1317 2sb6 1318 sb6a 1319 2sb5rf 1320 2sb6rf 1321 sb7 1322 sb7f 1323 sb10f 1324 sbelx 1326 sbel2x 1327 sbal1 1328 sbal 1329 exsb 1332 2exsb 1333 dveeq1 1335 sbal2 1338 ax15 1339 ax11eq 1340 ax11el 1341 ax11f 1342 ax11indn 1343 ax11indi 1344 ax11indalem 1345 ax11inda2 1347 ax11inda 1348 a12stdy1 1349 a12stdy3 1351 a12stdy4 1352 a12lem1 1353 a12lem2 1354 a12study 1355 a12studyALT 1356 euf 1361 eubid 1362 eubii 1364 hbeu1 1365 hbeu 1366 sb8eu 1367 eu1 1369 mo 1370 euex 1371 eumo0 1372 eu2 1373 eu3 1374 mo2 1377 mo3 1378 mo4f 1379 mobii 1382 eu5 1386 eu4 1387 immo 1394 moimv 1396 moanim 1404 mopick 1410 2mo 1424 2mos 1425 2eu4 1429 2eu5 1430 2eu6 1431 exists1 1434 exists2 1435 cbvrexf 8698 infi1 8706 ficli 8727 fgsb2 8799 icmpmon 8937 |