Theorem rexeqdv 2709

Description: Equality deduction for restricted existential quantifier. (Contributed by NM, 14-Jan-2007.)

Hypothesis

Ref	Expression
raleq1d.1	|- ( ph -> A = B )

Assertion

Ref	Expression
rexeqdv	|- ( ph -> ( E. x e. A ps <-> E. x e. B ps ) )

Distinct variable groups:   x, A   x, B

Allowed substitution hints:   ph( x)   ps( x)

Proof of Theorem rexeqdv

Step	Hyp	Ref	Expression
1		raleq1d.1	. 2 |- ( ph -> A = B )
2		rexeq 2703	. 2 |- ( A = B -> ( E. x e. A ps <-> E. x e. B ps ) )
3	1, 2	syl 14	1 |- ( ph -> ( E. x e. A ps <-> E. x e. B ps ) )

Syntax hints:   -> wi 4   <-> wb 105   = wceq 1373   E.wrex 2485

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 711  ax-5 1470  ax-7 1471  ax-gen 1472  ax-ie1 1516  ax-ie2 1517  ax-8 1527  ax-10 1528  ax-11 1529  ax-i12 1530  ax-bndl 1532  ax-4 1533  ax-17 1549  ax-i9 1553  ax-ial 1557  ax-i5r 1558  ax-ext 2187

This theorem depends on definitions:  df-bi 117  df-tru 1376  df-nf 1484  df-sb 1786  df-cleq 2198  df-clel 2201  df-nfc 2337  df-rex 2490

This theorem is referenced by:  rexeqtrdv  2711  rexeqtrrdv  2713  rexeqbidv  2719  rexeqbidva  2721  fnunirn  5836  cbvexfo  5855  fival  7072  nninfwlpoimlemg  7277  nninfwlpoimlemginf  7278  nninfwlpoim  7281  nninfinfwlpo  7282  genipv  7622  exfzdc  10369  infssuzex  10376  nninfdcex  10380  zproddc  11890  ennnfonelemrnh  12787  grppropd  13349  dvdsrpropdg  13909  znunit  14421  cnpfval  14667  plyval  15204