Theorem 1m1e0

Description: One minus one equals zero. (Contributed by David A. Wheeler, 7-Jul-2016)

	Ref	Expression
Assertion	1m1e0	⊢ ( 1 − 1 ) = 0

Proof

Step	Hyp	Ref	Expression
1		ax-1cn	⊢ 1 ∈ ℂ
2	1	subidi	⊢ ( 1 − 1 ) = 0