Theorem 1le3

Description: 1 is less than or equal to 3. (Contributed by David A. Wheeler, 8-Dec-2018)

	Ref	Expression
Assertion	1le3	$$⊢1\le 3$$

Proof

Step	Hyp	Ref	Expression
1		1re	$$⊢1\in ℝ$$
2		3re	$$⊢3\in ℝ$$
3		1lt3	$$⊢1<3$$
4	1 2 3	ltleii	$$⊢1\le 3$$