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Metamath Proof Explorer

Theorem neg1rr

Description: -1 is a real number. (Contributed by David A. Wheeler, 5-Dec-2018)

		Ref	Expression
	Assertion	neg1rr	$⊢ - 1 \in ℝ$

Step	Hyp	Ref	Expression
1		1re	$⊢ 1 \in ℝ$
2	1	renegcli	$⊢ - 1 \in ℝ$