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Mirrors > Home > ILE Home > Th. List > zfpow | Unicode version |
Description: Axiom of Power Sets expressed with the fewest number of different variables. (Contributed by NM, 14-Aug-2003.) |
Ref | Expression |
---|---|
zfpow |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-pow 4176 |
. 2
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2 | elequ1 2152 |
. . . . . . 7
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3 | elequ1 2152 |
. . . . . . 7
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4 | 2, 3 | imbi12d 234 |
. . . . . 6
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5 | 4 | cbvalv 1917 |
. . . . 5
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6 | 5 | imbi1i 238 |
. . . 4
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7 | 6 | albii 1470 |
. . 3
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8 | 7 | exbii 1605 |
. 2
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9 | 1, 8 | mpbi 145 |
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-13 2150 ax-pow 4176 |
This theorem depends on definitions: df-bi 117 df-nf 1461 |
This theorem is referenced by: el 4180 |
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