Theorem mulcomi 8025

Description: Commutative law for multiplication. (Contributed by NM, 23-Nov-1994.)

Hypotheses

Ref	Expression
axi.1	⊢ 𝐴 ∈ ℂ
axi.2	⊢ 𝐵 ∈ ℂ

Assertion

Ref	Expression
mulcomi	⊢ (𝐴 · 𝐵) = (𝐵 · 𝐴)

Proof of Theorem mulcomi

Step	Hyp	Ref	Expression
1		axi.1	. 2 ⊢ 𝐴 ∈ ℂ
2		axi.2	. 2 ⊢ 𝐵 ∈ ℂ
3		mulcom 8001	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 · 𝐵) = (𝐵 · 𝐴))
4	1, 2, 3	mp2an 426	1 ⊢ (𝐴 · 𝐵) = (𝐵 · 𝐴)

Syntax hints:   = wceq 1364   ∈ wcel 2164  (class class class)co 5918  ℂcc 7870   · cmul 7877

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia3 108  ax-mulcom 7973

This theorem is referenced by:  mulcomli  8026  8th4div3  9201  numma2c  9493  nummul2c  9497  9t11e99  9577  binom2i  10719  fac3  10803  tanval2ap  11856  pockthi  12496  sincosq4sgn  14964  2logb9irrALT  15106  2lgsoddprmlem2  15194  2lgsoddprmlem3d  15198