bi.bldneg

Theorem.

Arguments:

(pr), (pr),

Hypotheses:

()

Assertions:

()

Proof:

Hyp	Ref	Line	Expr
	Hypo	1	()
1	bi<	2	()
2	con	3	()
1	bi>	4	()
4	con	5	()
3, 5	>bii	6	()