excom13

Theorem.

Arguments:

(sv), (sv), (sv), (pr),

Assertions:

()

Proof:

Hyp	Ref	Line	Expr
	excom	1	()
	excom	2	()
2	eqt-∃-i	3	()
	excom	4	()
1, 3, 4	2bitr	5	()