Theorem mnflt0

Description: Minus infinity is less than 0. (Contributed by David A. Wheeler, 8-Dec-2018)

	Ref	Expression
Assertion	mnflt0	$$⊢\mathrm{-\infty }<0$$

Proof

Step	Hyp	Ref	Expression
1		0re	$$⊢0\in ℝ$$
2		mnflt	$$⊢0\in ℝ\to \mathrm{-\infty }<0$$
3	1 2	ax-mp	$$⊢\mathrm{-\infty }<0$$