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Theorem an13s 650
Description: Swap two conjuncts in antecedent. (Contributed by NM, 31-May-2006.)
Hypothesis
Ref Expression
an12s.1 ((𝜑 ∧ (𝜓𝜒)) → 𝜃)
Assertion
Ref Expression
an13s ((𝜒 ∧ (𝜓𝜑)) → 𝜃)

Proof of Theorem an13s
StepHypRef Expression
1 an12s.1 . . . 4 ((𝜑 ∧ (𝜓𝜒)) → 𝜃)
21exp32 424 . . 3 (𝜑 → (𝜓 → (𝜒𝜃)))
32com13 88 . 2 (𝜒 → (𝜓 → (𝜑𝜃)))
43imp32 422 1 ((𝜒 ∧ (𝜓𝜑)) → 𝜃)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 399
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 210  df-an 400
This theorem is referenced by:  cusgrfilem1  27245  abfmpeld  30417
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