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Mirrors > Home > ILE Home > Th. List > 19.42vvv | Unicode version |
Description: Theorem 19.42 of [Margaris] p. 90 with 3 quantifiers. (Contributed by NM, 21-Sep-2011.) |
Ref | Expression |
---|---|
19.42vvv |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 19.42vv 1863 |
. . 3
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2 | 1 | exbii 1567 |
. 2
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3 | 19.42v 1860 |
. 2
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4 | 2, 3 | bitri 183 |
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-gen 1408 ax-ie1 1452 ax-ie2 1453 ax-4 1470 ax-17 1489 ax-ial 1497 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: ceqsex6v 2701 |
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