Metamath Proof Explorer


Theorem exp5d

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

Ref Expression
Hypothesis exp5d.1 φ ψ χ θ τ η
Assertion exp5d φ ψ χ θ τ η

Proof

Step Hyp Ref Expression
1 exp5d.1 φ ψ χ θ τ η
2 1 expd φ ψ χ θ τ η
3 2 exp31 φ ψ χ θ τ η