Theorem bnj290 34250

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

Assertion

Ref	Expression
bnj290	⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒 ∧ 𝜃) ↔ (𝜑 ∧ 𝜒 ∧ 𝜃 ∧ 𝜓))

Proof of Theorem bnj290

Step	Hyp	Ref	Expression
1		3anrot 1097	. . 3 ⊢ ((𝜓 ∧ 𝜒 ∧ 𝜃) ↔ (𝜒 ∧ 𝜃 ∧ 𝜓))
2	1	anbi2i 622	. 2 ⊢ ((𝜑 ∧ (𝜓 ∧ 𝜒 ∧ 𝜃)) ↔ (𝜑 ∧ (𝜒 ∧ 𝜃 ∧ 𝜓)))
3		bnj252 34243	. 2 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒 ∧ 𝜃) ↔ (𝜑 ∧ (𝜓 ∧ 𝜒 ∧ 𝜃)))
4		bnj252 34243	. 2 ⊢ ((𝜑 ∧ 𝜒 ∧ 𝜃 ∧ 𝜓) ↔ (𝜑 ∧ (𝜒 ∧ 𝜃 ∧ 𝜓)))
5	2, 3, 4	3bitr4i 303	1 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒 ∧ 𝜃) ↔ (𝜑 ∧ 𝜒 ∧ 𝜃 ∧ 𝜓))

Syntax hints:   ↔ wb 205   ∧ wa 395   ∧ w3a 1084   ∧ w-bnj17 34226

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 206  df-an 396  df-3an 1086  df-bnj17 34227

This theorem is referenced by:  bnj291  34251  bnj334  34253