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Mirrors > Home > ILE Home > Th. List > pm2.04 | Unicode version |
Description: Swap antecedents. Theorem *2.04 of [WhiteheadRussell] p. 100. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 12-Sep-2012.) |
Ref | Expression |
---|---|
pm2.04 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 19 | . 2 | |
2 | 1 | com23 77 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 |
This theorem is referenced by: com34 82 com45 88 bi2.04 246 equsexd 1657 sbi2v 1813 ralcom3 2521 gencbval 2647 bj-findis 10774 |
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