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Mirrors > Home > MPE Home > Th. List > pm3.1 | Structured version Visualization version Unicode version |
Description: Theorem *3.1 of [WhiteheadRussell] p. 111. (Contributed by NM, 3-Jan-2005.) |
Ref | Expression |
---|---|
pm3.1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | anor 510 | . 2 | |
2 | 1 | biimpi 206 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wn 3 wi 4 wo 383 wa 384 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 |
This theorem is referenced by: pm3.14 523 |
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