Theorem 2pos

Description: The number 2 is positive. (Contributed by NM, 27-May-1999)

	Ref	Expression
Assertion	2pos	|- 0 < 2

Proof

Step	Hyp	Ref	Expression
1		1re	|- 1 e. RR
2		0lt1	|- 0 < 1
3	1 1 2 2	addgt0ii	|- 0 < ( 1 + 1 )
4		df-2	|- 2 = ( 1 + 1 )
5	3 4	breqtrri	|- 0 < 2