im.bldext

Theorem.

Arguments:

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

Assertions:

(()())

Proof:

Hyp	Ref	Line	Expr
	con	1	(()())
1	2im.bldal	2	(()())
2	con	3	(()())
	df-ex	4	()
	df-ex	5	()
3, 4, 5	<imtrg	6	(()())