Theorem an32 564

Description: A rearrangement of conjuncts. (Contributed by NM, 12-Mar-1995.) (Proof shortened by Wolf Lammen, 25-Dec-2012.)

Assertion

Ref	Expression
an32	⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) ↔ ((𝜑 ∧ 𝜒) ∧ 𝜓))

Proof of Theorem an32

Step	Hyp	Ref	Expression
1		anass 401	. 2 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) ↔ (𝜑 ∧ (𝜓 ∧ 𝜒)))
2		an12 563	. 2 ⊢ ((𝜑 ∧ (𝜓 ∧ 𝜒)) ↔ (𝜓 ∧ (𝜑 ∧ 𝜒)))
3		ancom 266	. 2 ⊢ ((𝜓 ∧ (𝜑 ∧ 𝜒)) ↔ ((𝜑 ∧ 𝜒) ∧ 𝜓))
4	1, 2, 3	3bitri 206	1 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) ↔ ((𝜑 ∧ 𝜒) ∧ 𝜓))

Syntax hints:   ∧ wa 104   ↔ wb 105

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This theorem depends on definitions:  df-bi 117

This theorem is referenced by:  an32s  570  3anan32  1016  indifdir  3481  inrab2  3498  reupick  3509  unidif0  4285  resco  5272  f11o  5653  respreima  5810  dff1o6  5955  dfoprab2  6108  xpassen  7094  enq0enq  7762  elioomnf  10320  modfsummod  12169  pcqcl  13029  ballotfilem2  13172  tx1cn  15260  isms2  15445  elcncf1di  15570