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Mirrors > Home > NFE Home > Th. List > pm5.74d | Unicode version |
Description: Distribution of implication over biconditional (deduction rule). (Contributed by NM, 21-Mar-1996.) |
Ref | Expression |
---|---|
pm5.74d.1 |
Ref | Expression |
---|---|
pm5.74d |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm5.74d.1 | . 2 | |
2 | pm5.74 235 | . 2 | |
3 | 1, 2 | sylib 188 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 176 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 177 |
This theorem is referenced by: imbi2d 307 imim21b 356 pm5.74da 668 2mos 2283 dfiin2g 4000 |
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