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Mirrors > Home > NFE Home > Th. List > ibib | Unicode version |
Description: Implication in terms of implication and biconditional. (Contributed by NM, 31-Mar-1994.) (Proof shortened by Wolf Lammen, 24-Jan-2013.) |
Ref | Expression |
---|---|
ibib |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm5.501 330 | . 2 | |
2 | 1 | pm5.74i 236 | 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: (None) |
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