Theorem 1le3

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

	Ref	Expression
Assertion	1le3	⊢ 1 ≤ 3

Proof

Step	Hyp	Ref	Expression
1		1re	⊢ 1 ∈ ℝ
2		3re	⊢ 3 ∈ ℝ
3		1lt3	⊢ 1 < 3
4	1 2 3	ltleii	⊢ 1 ≤ 3