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Theorem a1i14 31300
Description: Add two antecedents to a wff. (Contributed by Jeff Hankins, 4-Aug-2009.)
Hypothesis
Ref Expression
a1i14.1 (𝜓 → (𝜒𝜏))
Assertion
Ref Expression
a1i14 (𝜑 → (𝜓 → (𝜒 → (𝜃𝜏))))

Proof of Theorem a1i14
StepHypRef Expression
1 a1i14.1 . . 3 (𝜓 → (𝜒𝜏))
21a1dd 47 . 2 (𝜓 → (𝜒 → (𝜃𝜏)))
32a1i 11 1 (𝜑 → (𝜓 → (𝜒 → (𝜃𝜏))))
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: (None)
  Copyright terms: Public domain W3C validator