Theorem gen2

Description: Generalization applied twice. (Contributed by NM, 30-Apr-1998)

	Ref	Expression
Hypothesis	gen2.1	|- ph
Assertion	gen2	|- A. x A. y ph

Proof

Step	Hyp	Ref	Expression
1		gen2.1	|- ph
2	1	ax-gen	|- A. y ph
3	2	ax-gen	|- A. x A. y ph