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Mirrors > Home > MPE Home > Th. List > iftrue | Structured version 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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dedlem0a 943 |
. . 3
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2 | 1 | abbi2dv 2591 |
. 2
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3 | dfif2 3902 |
. 2
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4 | 2, 3 | syl6reqr 2514 |
1
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