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Theorem com4l 78
Description: Commutation of antecedents. Rotate left. (Contributed by NM, 25-Apr-1994.) (Proof shortened by O'Cat, 15-Aug-2004.)
Hypothesis
Ref Expression
com4.1
Assertion
Ref Expression
com4l

Proof of Theorem com4l
StepHypRef Expression
1 com4.1 . . 3
21com3l 75 . 2
32com34 77 1
Colors of variables: wff setvar class
Syntax hints:   wi 4
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7
This theorem is referenced by:  com4t  79  com4r  80  com14  82  com5l  86  3impd  1165  merco2  1501  ax12b  1689
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