Theorem 2lt6

Description: 2 is less than 6. (Contributed by Mario Carneiro, 15-Sep-2013)

	Ref	Expression
Assertion	2lt6	⊢ 2 < 6

Proof

Step	Hyp	Ref	Expression
1		2lt3	⊢ 2 < 3
2		3lt6	⊢ 3 < 6
3		2re	⊢ 2 ∈ ℝ
4		3re	⊢ 3 ∈ ℝ
5		6re	⊢ 6 ∈ ℝ
6	3 4 5	lttri	⊢ ( ( 2 < 3 ∧ 3 < 6 ) → 2 < 6 )
7	1 2 6	mp2an	⊢ 2 < 6