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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 3948 |
. 2
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2 | elequ1 1640 |
. . . . . . 7
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3 | elequ1 1640 |
. . . . . . 7
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4 | 2, 3 | imbi12d 232 |
. . . . . 6
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5 | 4 | cbvalv 1835 |
. . . . 5
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6 | 5 | imbi1i 236 |
. . . 4
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7 | 6 | albii 1399 |
. . 3
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8 | 7 | exbii 1536 |
. 2
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9 | 1, 8 | mpbi 143 |
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 104 ax-ia2 105 ax-ia3 106 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-4 1440 ax-13 1444 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-pow 3948 |
This theorem depends on definitions: df-bi 115 df-nf 1390 |
This theorem is referenced by: el 3952 |
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