Theorem ancom2s 556

Description: Inference commuting a nested conjunction in antecedent. (Contributed by NM, 24-May-2006.) (Proof shortened by Wolf Lammen, 24-Nov-2012.)

Hypothesis

Ref	Expression
an12s.1	⊢ ((𝜑 ∧ (𝜓 ∧ 𝜒)) → 𝜃)

Assertion

Ref	Expression
ancom2s	⊢ ((𝜑 ∧ (𝜒 ∧ 𝜓)) → 𝜃)

Proof of Theorem ancom2s

Step	Hyp	Ref	Expression
1		pm3.22 263	. 2 ⊢ ((𝜒 ∧ 𝜓) → (𝜓 ∧ 𝜒))
2		an12s.1	. 2 ⊢ ((𝜑 ∧ (𝜓 ∧ 𝜒)) → 𝜃)
3	1, 2	sylan2 284	1 ⊢ ((𝜑 ∧ (𝜒 ∧ 𝜓)) → 𝜃)

Syntax hints:   → wi 4   ∧ wa 103

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107

This theorem is referenced by:  an42s  579  ordsuc  4486  xpexr2m  4988  f1elima  5682  f1imaeq  5684  isosolem  5733  caovlem2d  5971  2ndconst  6127  isotilem  6901  prarloclem4  7330  mulsub  8187  leltadd  8233  eqord1  8269  divmul24ap  8500  fprodseq  11384  blcomps  12604  blcom  12605  cxple  13045  cxple3  13049