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Mirrors > Home > MPE Home > Th. List > bm1.3ii | Structured version Visualization version Unicode version |
Description: Convert implication to equivalence using the Separation Scheme (Aussonderung) ax-sep 4781. Similar to Theorem 1.3ii of [BellMachover] p. 463. (Contributed by NM, 21-Jun-1993.) |
Ref | Expression |
---|---|
bm1.3ii.1 |
Ref | Expression |
---|---|
bm1.3ii |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 19.42v 1918 | . . 3 | |
2 | bimsc1 980 | . . . . 5 | |
3 | 2 | alanimi 1744 | . . . 4 |
4 | 3 | eximi 1762 | . . 3 |
5 | 1, 4 | sylbir 225 | . 2 |
6 | bm1.3ii.1 | . . . . 5 | |
7 | elequ2 2004 | . . . . . . . 8 | |
8 | 7 | imbi2d 330 | . . . . . . 7 |
9 | 8 | albidv 1849 | . . . . . 6 |
10 | 9 | cbvexv 2275 | . . . . 5 |
11 | 6, 10 | mpbi 220 | . . . 4 |
12 | ax-sep 4781 | . . . 4 | |
13 | 11, 12 | pm3.2i 471 | . . 3 |
14 | 13 | exan 1788 | . 2 |
15 | 5, 14 | exlimiiv 1859 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 wal 1481 wex 1704 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-11 2034 ax-12 2047 ax-13 2246 ax-sep 4781 |
This theorem depends on definitions: df-bi 197 df-an 386 df-ex 1705 |
This theorem is referenced by: axpow3 4846 pwex 4848 zfpair2 4907 axun2 6951 uniex2 6952 |
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