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Metamath Proof Explorer

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 ∈ ℂ
2 1 addlidi ⊢ 0 + 1 = 1