Description: Inference form of dfvd3an . (Contributed by Alan Sare, 13-Jun-2015) (Proof modification is discouraged.) (New usage is discouraged.)
Ref | Expression | ||
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Hypothesis | dfvd3ani.1 | |- (. (. ph ,. ps ,. ch ). ->. th ). |
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Assertion | dfvd3ani | |- ( ( ph /\ ps /\ ch ) -> th ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfvd3ani.1 | |- (. (. ph ,. ps ,. ch ). ->. th ). |
|
2 | dfvd3an | |- ( (. (. ph ,. ps ,. ch ). ->. th ). <-> ( ( ph /\ ps /\ ch ) -> th ) ) |
|
3 | 1 2 | mpbi | |- ( ( ph /\ ps /\ ch ) -> th ) |