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Metamath Proof Explorer

Theorem re1

Description: The real part of one. (Contributed by Scott Fenton, 9-Jun-2006)

		Ref	Expression
	Assertion	re1	$⊢ ℜ (1) = 1$

Step	Hyp	Ref	Expression
1		1re	$⊢ 1 \in ℝ$
2		rere	$⊢ 1 \in ℝ \to ℜ (1) = 1$
3	1 2	ax-mp	$⊢ ℜ (1) = 1$