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Mirrors > Home > MPE Home > Th. List > iftrue | Unicode version |
Description: Value of the conditional operator when its first argument is true. (Contributed by NM, 15-May-1999.) (Proof shortened by Andrew Salmon, 26-Jun-2011.) |
Ref | Expression |
---|---|
iftrue |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dedlem0a 952 | . . 3 | |
2 | 1 | abbi2dv 2594 | . 2 |
3 | dfif2 3943 | . 2 | |
4 | 2, 3 | syl6reqr 2517 | 1 |
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