Metamath Proof Explorer


Theorem com52r

Description: Commutation of antecedents. Rotate right twice. (Contributed by Jeff Hankins, 28-Jun-2009)

Ref Expression
Hypothesis com5.1 φψχθτη
Assertion com52r θτφψχη

Proof

Step Hyp Ref Expression
1 com5.1 φψχθτη
2 1 com52l χθτφψη
3 2 com5l θτφψχη