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Mirrors > Home > MPE Home > Th. List > iffalse | Unicode version |
Description: Value of the conditional operator when its first argument is false. (Contributed by NM, 14-Aug-1999.) |
Ref | Expression |
---|---|
iffalse |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dedlemb 955 | . . 3 | |
2 | 1 | abbi2dv 2594 | . 2 |
3 | df-if 3942 | . 2 | |
4 | 2, 3 | syl6reqr 2517 | 1 |
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