Theorem bnj312 34968

Description: ∧-manipulation. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (New usage is discouraged.)

Assertion

Ref	Expression
bnj312	⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒 ∧ 𝜃) ↔ (𝜓 ∧ 𝜑 ∧ 𝜒 ∧ 𝜃))

Proof of Theorem bnj312

Step	Hyp	Ref	Expression
1		3ancoma 1109	. . 3 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) ↔ (𝜓 ∧ 𝜑 ∧ 𝜒))
2	1	anbi1i 633	. 2 ⊢ (((𝜑 ∧ 𝜓 ∧ 𝜒) ∧ 𝜃) ↔ ((𝜓 ∧ 𝜑 ∧ 𝜒) ∧ 𝜃))
3		df-bnj17 34943	. 2 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒 ∧ 𝜃) ↔ ((𝜑 ∧ 𝜓 ∧ 𝜒) ∧ 𝜃))
4		df-bnj17 34943	. 2 ⊢ ((𝜓 ∧ 𝜑 ∧ 𝜒 ∧ 𝜃) ↔ ((𝜓 ∧ 𝜑 ∧ 𝜒) ∧ 𝜃))
5	2, 3, 4	3bitr4i 305	1 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒 ∧ 𝜃) ↔ (𝜓 ∧ 𝜑 ∧ 𝜒 ∧ 𝜃))

Syntax hints:   ↔ wb 208   ∧ wa 399   ∧ w3a 1097   ∧ w-bnj17 34942

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 209  df-an 400  df-3an 1099  df-bnj17 34943

This theorem is referenced by:  bnj334  34969  bnj563  34999  bnj953  35194