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Mirrors > Home > ILE Home > Th. List > 19.41vvvv | Unicode version |
Description: Theorem 19.41 of [Margaris] p. 90 with 4 quantifiers. (Contributed by FL, 14-Jul-2007.) |
Ref | Expression |
---|---|
19.41vvvv |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 19.41vvv 1904 |
. . 3
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2 | 1 | exbii 1605 |
. 2
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3 | 19.41v 1902 |
. 2
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4 | 2, 3 | bitri 184 |
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-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-4 1510 ax-17 1526 ax-ial 1534 |
This theorem depends on definitions: df-bi 117 |
This theorem is referenced by: (None) |
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