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Mirrors > Home > ILE Home > Th. List > pm2.52 | Unicode version |
Description: Theorem *2.52 of [WhiteheadRussell] p. 107. (Contributed by NM, 3-Jan-2005.) (Revised by Mario Carneiro, 31-Jan-2015.) |
Ref | Expression |
---|---|
pm2.52 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm2.21 547 | . . 3 | |
2 | 1 | pm2.24d 552 | . 2 |
3 | 2 | com12 27 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-in2 545 |
This theorem is referenced by: pm2.521dc 764 |
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