<2tri-r

Theorem.

Arguments:

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

Hypotheses:

()

()

()

Assertions:

()

Proof:

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