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Theorem rexbiia 2647

Description: Inference adding restricted existential quantifier to both sides of an equivalence. (Contributed by NM, 26-Oct-1999.)

**Hypothesis**
Ref	Expression
ralbiia.1

**Assertion**
Ref	Expression
rexbiia

**Proof of Theorem rexbiia**
Step	Hyp	Ref	Expression
1		ralbiia.1	. . 3
2	1	pm5.32i 618	. 2 $/\$ $/\$
3	2	rexbii2 2643	1

Colors of variables: wff setvar class

Syntax hints:

wi 4

wb 176

wcel 1710

wrex 2615

This theorem was proved from axioms: ax-1 5 ax-2 6 ax-3 7 ax-mp 8 ax-gen 1546 ax-5 1557

This theorem depends on definitions: df-bi 177 df-an 360 df-ex 1542 df-rex 2620

This theorem is referenced by: 2rexbiia 2648 ceqsrexbv 2973 reu8 3032 phialllem1 4616 finnc 6243 nchoicelem11 6299 nchoicelem16 6304