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Mirrors > Home > NFE Home > Th. List > rbaibd | Unicode version |
Description: Move conjunction outside of biconditional. (Contributed by Mario Carneiro, 11-Sep-2015.) |
Ref | Expression |
---|---|
baibd.1 |
Ref | Expression |
---|---|
rbaibd |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | baibd.1 | . 2 | |
2 | iba 489 | . . 3 | |
3 | 2 | bicomd 192 | . 2 |
4 | 1, 3 | sylan9bb 680 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 176 wa 358 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-3 7 ax-mp 8 |
This theorem depends on definitions: df-bi 177 df-an 360 |
This theorem is referenced by: (None) |
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