Theorem 5lt6

Description: 5 is less than 6. (Contributed by Mario Carneiro, 15-Sep-2013)

	Ref	Expression
Assertion	5lt6	$$⊢5<6$$

Proof

Step	Hyp	Ref	Expression
1		5re	$$⊢5\in ℝ$$
2	1	ltp1i	$$⊢5<5+1$$
3		df-6	$$⊢6=5+1$$
4	2 3	breqtrri	$$⊢5<6$$