Theorem 1t1e1

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

	Ref	Expression
Assertion	1t1e1	$$⊢1\cdot 1=1$$

Proof

Step	Hyp	Ref	Expression
1		ax-1cn	$$⊢1\in ℂ$$
2	1	mulid1i	$$⊢1\cdot 1=1$$