Theorem bnj170 34712

Description: ∧-manipulation. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (Proof shortened by Andrew Salmon, 14-Jun-2011.) (New usage is discouraged.)

Assertion

Ref	Expression
bnj170	⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) ↔ ((𝜓 ∧ 𝜒) ∧ 𝜑))

Proof of Theorem bnj170

Step	Hyp	Ref	Expression
1		3anrot 1100	. 2 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) ↔ (𝜓 ∧ 𝜒 ∧ 𝜑))
2		df-3an 1089	. 2 ⊢ ((𝜓 ∧ 𝜒 ∧ 𝜑) ↔ ((𝜓 ∧ 𝜒) ∧ 𝜑))
3	1, 2	bitri 275	1 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) ↔ ((𝜓 ∧ 𝜒) ∧ 𝜑))

Syntax hints:   ↔ wb 206   ∧ wa 395   ∧ w3a 1087

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 207  df-an 396  df-3an 1089

This theorem is referenced by:  bnj543  34907  bnj605  34921  bnj594  34926  bnj607  34930  bnj908  34945  bnj1173  35016