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Mirrors > Home > ILE Home > Th. List > eqrel | Unicode version |
Description: Extensionality principle for relations. Theorem 3.2(ii) of [Monk1] p. 33. (Contributed by NM, 2-Aug-1994.) |
Ref | Expression |
---|---|
eqrel |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssrel 4428 | . . 3 | |
2 | ssrel 4428 | . . 3 | |
3 | 1, 2 | bi2anan9 538 | . 2 |
4 | eqss 2960 | . 2 | |
5 | 2albiim 1377 | . 2 | |
6 | 3, 4, 5 | 3bitr4g 212 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 97 wb 98 wal 1241 wceq 1243 wcel 1393 wss 2917 cop 3378 wrel 4350 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-sep 3875 ax-pow 3927 ax-pr 3944 |
This theorem depends on definitions: df-bi 110 df-3an 887 df-tru 1246 df-nf 1350 df-sb 1646 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-v 2559 df-un 2922 df-in 2924 df-ss 2931 df-pw 3361 df-sn 3381 df-pr 3382 df-op 3384 df-opab 3819 df-xp 4351 df-rel 4352 |
This theorem is referenced by: eqrelriv 4433 eqrelrdv 4436 eqbrrdv 4437 eqrelrdv2 4439 opabid2 4467 reldm0 4553 iss 4654 asymref 4710 funssres 4942 fsn 5335 |
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