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Mirrors > Home > ILE Home > Th. List > pm2.75 | Unicode version |
Description: Theorem *2.75 of [WhiteheadRussell] p. 108. (Contributed by NM, 3-Jan-2005.) (Proof shortened by Wolf Lammen, 4-Jan-2013.) |
Ref | Expression |
---|---|
pm2.75 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm2.76 721 | . 2 | |
2 | 1 | com12 27 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wo 629 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 630 |
This theorem depends on definitions: df-bi 110 |
This theorem is referenced by: (None) |
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