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Mirrors > Home > ILE Home > Th. List > abai | Unicode version |
Description: Introduce one conjunct as an antecedent to the other. "abai" stands for "and, biconditional, and, implication". (Contributed by NM, 12-Aug-1993.) (Proof shortened by Wolf Lammen, 7-Dec-2012.) |
Ref | Expression |
---|---|
abai |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | biimt 239 | . 2 | |
2 | 1 | pm5.32i 441 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 102 wb 103 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 |
This theorem depends on definitions: df-bi 115 |
This theorem is referenced by: eu2 1985 |
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