bi.bldbi<d

Theorem.

Arguments:

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

Hypotheses:

(())

Assertions:

((()()))

Proof:

Hyp	Ref	Line	Expr
	Hypo	1	(())
1	bi.bldbi>d	2	((()()))
	bicom	3	(()())
	bicom	4	(()())
2, 3, 4	<2bitrg	5	((()()))