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Mirrors > Home > ILE Home > Th. List > rbaibr | Unicode version |
Description: Move conjunction outside of biconditional. (Contributed by Mario Carneiro, 11-Sep-2015.) |
Ref | Expression |
---|---|
baib.1 |
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Ref | Expression |
---|---|
rbaibr |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | baib.1 |
. . 3
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2 | ancom 266 |
. . 3
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3 | 1, 2 | bitri 184 |
. 2
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4 | 3 | baibr 920 |
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 |
This theorem depends on definitions: df-bi 117 |
This theorem is referenced by: (None) |
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