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Theorem pm5.44 833
Description: Theorem *5.44 of [WhiteheadRussell] p. 125. (Contributed by NM, 3-Jan-2005.)
Assertion
Ref Expression
pm5.44 ((φψ) → ((φχ) ↔ (φ → (ψ χ))))

Proof of Theorem pm5.44
StepHypRef Expression
1 jcab 535 . 2 ((φ → (ψ χ)) ↔ ((φψ) (φχ)))
21baibr 828 1 ((φψ) → ((φχ) ↔ (φ → (ψ χ))))
Colors of variables: wff set class
Syntax hints:  wi 4   wa 97  wb 98
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101
This theorem depends on definitions:  df-bi 110
This theorem is referenced by:  reldisj  3265
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