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Mirrors > Home > ILE Home > Th. List > exbi | Unicode version |
Description: Theorem 19.18 of [Margaris] p. 90. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
exbi |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | biimp 118 |
. . . 4
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2 | 1 | alimi 1455 |
. . 3
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3 | exim 1599 |
. . 3
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4 | 2, 3 | syl 14 |
. 2
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5 | biimpr 130 |
. . . 4
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6 | 5 | alimi 1455 |
. . 3
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7 | exim 1599 |
. . 3
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8 | 6, 7 | syl 14 |
. 2
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9 | 4, 8 | impbid 129 |
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-ial 1534 |
This theorem depends on definitions: df-bi 117 |
This theorem is referenced by: exbii 1605 exbidh 1614 exintrbi 1633 19.19 1666 rexrnmpt 5655 |
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