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Metamath Proof Explorer

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