Theorem mulcomi 8285

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 8261	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 · 𝐵) = (𝐵 · 𝐴))
4	1, 2, 3	mp2an 426	1 ⊢ (𝐴 · 𝐵) = (𝐵 · 𝐴)

Syntax hints:   = wceq 1398   ∈ wcel 2205  (class class class)co 6052  ℂcc 8130   · cmul 8137

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia3 108  ax-mulcom 8233

This theorem is referenced by:  mulcomli  8286  8th4div3  9462  numma2c  9760  nummul2c  9764  9t11e99  9844  binom2i  11017  fac3  11102  tanval2ap  12407  pockthi  13064  decsplit1  13134  decsplit  13135  sincosq4sgn  15743  2logb9irrALT  15888  2lgsoddprmlem2  16028  2lgsoddprmlem3d  16032