Metamath Proof Explorer


Theorem exp58

Description: An exportation inference. (Contributed by Jeff Hankins, 7-Jul-2009)

Ref Expression
Hypothesis exp58.1 φ ψ χ θ τ η
Assertion exp58 φ ψ χ θ τ η

Proof

Step Hyp Ref Expression
1 exp58.1 φ ψ χ θ τ η
2 1 ex φ ψ χ θ τ η
3 2 exp5g φ ψ χ θ τ η