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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 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 19.41vvv 1892 | . . 3 | |
2 | 1 | exbii 1593 | . 2 |
3 | 19.41v 1890 | . 2 | |
4 | 2, 3 | bitri 183 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 103 wb 104 wex 1480 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1435 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-4 1498 ax-17 1514 ax-ial 1522 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: (None) |
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