bi.bldbi<>d

Theorem.

Arguments:

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

Hypotheses:

(())

(())

Assertions:

((()()))

Proof:

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