Theorem 1t1e1

Description: 1 times 1 equals 1. (Contributed by David A. Wheeler, 7-Jul-2016)

	Ref	Expression
Assertion	1t1e1	⊢ ( 1 · 1 ) = 1

Proof

Step	Hyp	Ref	Expression
1		ax-1cn	⊢ 1 ∈ ℂ
2	1	mulid1i	⊢ ( 1 · 1 ) = 1