Theorem 0p1e1

Description: 0 + 1 = 1. (Contributed by David A. Wheeler, 7-Jul-2016)

	Ref	Expression
Assertion	0p1e1	|- ( 0 + 1 ) = 1

Proof

Step	Hyp	Ref	Expression
1		ax-1cn	|- 1 e. CC
2	1	addid2i	|- ( 0 + 1 ) = 1