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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 4123. 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 2153 |
. . . . . . . 8
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3 | 2 | imbi2d 230 |
. . . . . . 7
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4 | 3 | albidv 1824 |
. . . . . 6
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5 | 4 | cbvexv 1918 |
. . . . 5
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6 | 1, 5 | mpbi 145 |
. . . 4
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7 | ax-sep 4123 |
. . . 4
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8 | 6, 7 | pm3.2i 272 |
. . 3
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9 | 8 | exan 1693 |
. 2
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10 | 19.42v 1906 |
. . . 4
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11 | bimsc1 963 |
. . . . . 6
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12 | 11 | alanimi 1459 |
. . . . 5
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13 | 12 | eximi 1600 |
. . . 4
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14 | 10, 13 | sylbir 135 |
. . 3
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15 | 14 | exlimiv 1598 |
. 2
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16 | 9, 15 | ax-mp 5 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-14 2151 ax-sep 4123 |
This theorem depends on definitions: df-bi 117 |
This theorem is referenced by: axpow3 4179 vpwex 4181 zfpair2 4212 axun2 4437 uniex2 4438 |
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