Theorem nfra2

Description: Similar to Lemma 24 of Monk2 p. 114, except the quantification of the antecedent is restricted. Derived automatically from hbra2VD . Usage of this theorem is discouraged because it depends on ax-13 . Use the weaker nfra2w when possible. (Contributed by Alan Sare, 31-Dec-2011) (New usage is discouraged.)

	Ref	Expression
Assertion	nfra2	|- F/ y A. x e. A A. y e. B ph

Proof

Step	Hyp	Ref	Expression
1		nfcv	|- F/_ y A
2		nfra1	|- F/ y A. y e. B ph
3	1 2	nfral	|- F/ y A. x e. A A. y e. B ph