<2tri

Theorem.

Arguments:

(obj), (obj), (obj), (obj),

Hypotheses:

()

()

()

Assertions:

()

Proof:

Hyp	Ref	Line	Expr
	Hypo	1	()
		2	()
		3	()
1	ax-sym	4	()
2, 3, 4	2tri	5	()