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Mirrors > Home > ILE Home > Th. List > pm5.53 | Unicode version |
Description: Theorem *5.53 of [WhiteheadRussell] p. 125. (Contributed by NM, 3-Jan-2005.) |
Ref | Expression |
---|---|
pm5.53 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | jaob 631 | . 2 | |
2 | jaob 631 | . . 3 | |
3 | 2 | anbi1i 431 | . 2 |
4 | 1, 3 | bitri 173 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 97 wb 98 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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