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Mirrors > Home > ILE Home > Th. List > cleqh | Unicode version |
Description: Establish equality between classes, using bound-variable hypotheses instead of distinct variable conditions. See also cleqf 2201. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
cleqh.1 | |
cleqh.2 |
Ref | Expression |
---|---|
cleqh |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfcleq 2034 | . 2 | |
2 | ax-17 1419 | . . . 4 | |
3 | dfbi2 368 | . . . . 5 | |
4 | cleqh.1 | . . . . . . 7 | |
5 | cleqh.2 | . . . . . . 7 | |
6 | 4, 5 | hbim 1437 | . . . . . 6 |
7 | 5, 4 | hbim 1437 | . . . . . 6 |
8 | 6, 7 | hban 1439 | . . . . 5 |
9 | 3, 8 | hbxfrbi 1361 | . . . 4 |
10 | eleq1 2100 | . . . . . 6 | |
11 | eleq1 2100 | . . . . . 6 | |
12 | 10, 11 | bibi12d 224 | . . . . 5 |
13 | 12 | biimpd 132 | . . . 4 |
14 | 2, 9, 13 | cbv3h 1631 | . . 3 |
15 | 12 | equcoms 1594 | . . . . 5 |
16 | 15 | biimprd 147 | . . . 4 |
17 | 9, 2, 16 | cbv3h 1631 | . . 3 |
18 | 14, 17 | impbii 117 | . 2 |
19 | 1, 18 | bitr4i 176 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 97 wb 98 wal 1241 wceq 1243 wcel 1393 |
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-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-4 1400 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 |
This theorem depends on definitions: df-bi 110 df-nf 1350 df-cleq 2033 df-clel 2036 |
This theorem is referenced by: abeq2 2146 |
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