Theorem 3ancomb 938

Description: Commutation law for triple conjunction. (Contributed by NM, 21-Apr-1994.)

Assertion

Ref	Expression
3ancomb	⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) ↔ (𝜑 ∧ 𝜒 ∧ 𝜓))

Proof of Theorem 3ancomb

Step	Hyp	Ref	Expression
1		3ancoma 937	. 2 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) ↔ (𝜓 ∧ 𝜑 ∧ 𝜒))
2		3anrot 935	. 2 ⊢ ((𝜓 ∧ 𝜑 ∧ 𝜒) ↔ (𝜑 ∧ 𝜒 ∧ 𝜓))
3	1, 2	bitri 183	1 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) ↔ (𝜑 ∧ 𝜒 ∧ 𝜓))

Syntax hints:   ↔ wb 104   ∧ w3a 930

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

This theorem depends on definitions:  df-bi 116  df-3an 932

This theorem is referenced by:  3simpb  947  addcanprg  7325  elioore  9536  xmetrtri  12304