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Theorem pm3.41 579
Description: Theorem *3.41 of [WhiteheadRussell] p. 113. (Contributed by NM, 3-Jan-2005.)
Assertion
Ref Expression
pm3.41 ((𝜑𝜒) → ((𝜑𝜓) → 𝜒))

Proof of Theorem pm3.41
StepHypRef Expression
1 simpl 471 . 2 ((𝜑𝜓) → 𝜑)
21imim1i 60 1 ((𝜑𝜒) → ((𝜑𝜓) → 𝜒))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 382
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8
This theorem depends on definitions:  df-bi 195  df-an 384
This theorem is referenced by:  opabbrex  6567
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