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Metamath Proof Explorer


Theorem pm5.31r

Description: Variant of pm5.31 . (Contributed by Rodolfo Medina, 15-Oct-2010)

Ref Expression
Assertion pm5.31r χ φ ψ φ χ ψ

Proof

Step Hyp Ref Expression
1 ax-1 χ φ χ
2 id φ ψ φ ψ
3 1 2 anim12ii χ φ ψ φ χ ψ