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Metamath Proof Explorer

Theorem msqge0d

Description: A square is nonnegative. (Contributed by Mario Carneiro, 27-May-2016)

		Ref	Expression
	Hypothesis	leidd.1	$⊢ φ \to A \in ℝ$
	Assertion	msqge0d	$⊢ φ \to 0 \leq A A$

Step	Hyp	Ref	Expression
1		leidd.1	$⊢ φ \to A \in ℝ$
2		msqge0	$⊢ A \in ℝ \to 0 \leq A A$
3	1 2	syl	$⊢ φ \to 0 \leq A A$