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Mirrors > Home > ILE Home > Th. List > bm1.3ii | Unicode version |
Description: Convert implication to equivalence using the Separation Scheme (Aussonderung) ax-sep 3875. Similar to Theorem 1.3ii of [BellMachover] p. 463. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
bm1.3ii.1 |
Ref | Expression |
---|---|
bm1.3ii |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bm1.3ii.1 | . . . . 5 | |
2 | elequ2 1601 | . . . . . . . 8 | |
3 | 2 | imbi2d 219 | . . . . . . 7 |
4 | 3 | albidv 1705 | . . . . . 6 |
5 | 4 | cbvexv 1795 | . . . . 5 |
6 | 1, 5 | mpbi 133 | . . . 4 |
7 | ax-sep 3875 | . . . 4 | |
8 | 6, 7 | pm3.2i 257 | . . 3 |
9 | 8 | exan 1583 | . 2 |
10 | 19.42v 1786 | . . . 4 | |
11 | bimsc1 870 | . . . . . 6 | |
12 | 11 | alanimi 1348 | . . . . 5 |
13 | 12 | eximi 1491 | . . . 4 |
14 | 10, 13 | sylbir 125 | . . 3 |
15 | 14 | exlimiv 1489 | . 2 |
16 | 9, 15 | ax-mp 7 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 97 wb 98 wal 1241 wex 1381 |
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-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-sep 3875 |
This theorem depends on definitions: df-bi 110 |
This theorem is referenced by: axpow3 3930 pwex 3932 zfpair2 3945 axun2 4172 uniex2 4173 |
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