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Mirrors > Home > ILE Home > Th. List > nf4r | Unicode version |
Description: If ![]() ![]() ![]() |
Ref | Expression |
---|---|
nf4r |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | orcom 688 |
. . 3
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2 | alnex 1443 |
. . . 4
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3 | 2 | orbi2i 720 |
. . 3
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4 | 1, 3 | bitr4i 186 |
. 2
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5 | imorr 841 |
. . 3
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6 | nf2 1614 |
. . 3
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7 | 5, 6 | sylibr 133 |
. 2
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8 | 4, 7 | sylbir 134 |
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-in1 584 ax-in2 585 ax-io 671 ax-5 1391 ax-gen 1393 ax-ie2 1438 ax-4 1455 ax-ial 1482 |
This theorem depends on definitions: df-bi 116 df-tru 1302 df-fal 1305 df-nf 1405 |
This theorem is referenced by: (None) |
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