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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 4006. Similar to Theorem 1.3ii of [BellMachover] p. 463. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
bm1.3ii.1 |
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Ref | Expression |
---|---|
bm1.3ii |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bm1.3ii.1 |
. . . . 5
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2 | elequ2 1674 |
. . . . . . . 8
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3 | 2 | imbi2d 229 |
. . . . . . 7
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4 | 3 | albidv 1778 |
. . . . . 6
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5 | 4 | cbvexv 1870 |
. . . . 5
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6 | 1, 5 | mpbi 144 |
. . . 4
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7 | ax-sep 4006 |
. . . 4
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8 | 6, 7 | pm3.2i 268 |
. . 3
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9 | 8 | exan 1654 |
. 2
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10 | 19.42v 1860 |
. . . 4
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11 | bimsc1 930 |
. . . . . 6
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12 | 11 | alanimi 1418 |
. . . . 5
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13 | 12 | eximi 1562 |
. . . 4
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14 | 10, 13 | sylbir 134 |
. . 3
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15 | 14 | exlimiv 1560 |
. 2
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16 | 9, 15 | ax-mp 7 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1406 ax-7 1407 ax-gen 1408 ax-ie1 1452 ax-ie2 1453 ax-8 1465 ax-4 1470 ax-14 1475 ax-17 1489 ax-i9 1493 ax-ial 1497 ax-sep 4006 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: axpow3 4061 vpwex 4063 zfpair2 4092 axun2 4317 uniex2 4318 |
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