Theorem spc2ev 2948

Description: Existential specialization, using implicit substitution. (Contributed by NM, 3-Aug-1995.)

Hypotheses

Ref	Expression
spc2ev.1	|- A e. _V
spc2ev.2	|- B e. _V
spc2ev.3	|- ((x = A /\ y = B) -> (ph <-> ps))

Assertion

Ref	Expression
spc2ev	|- (ps -> E.xE.yph)

Distinct variable groups:   x,y,A   x,B,y   ps,x,y

Allowed substitution hints:   ph(x,y)

Proof of Theorem spc2ev

Step	Hyp	Ref	Expression
1		spc2ev.1	. 2 |- A e. _V
2		spc2ev.2	. 2 |- B e. _V
3		spc2ev.3	. . 3 |- ((x = A /\ y = B) -> (ph <-> ps))
4	3	spc2egv 2942	. 2 |- ((A e. _V /\ B e. _V) -> (ps -> E.xE.yph))
5	1, 2, 4	mp2an 653	1 |- (ps -> E.xE.yph)

Syntax hints:   -> wi 4   <-> wb 176   /\ wa 358  E.wex 1541   = wceq 1642   e. wcel 1710  _Vcvv 2860

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-ext 2334

This theorem depends on definitions:  df-bi 177  df-an 360  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-cleq 2346  df-clel 2349  df-v 2862

This theorem is referenced by:  opkabssvvk  4209  dfpw12  4302  pw1equn  4332  pw1eqadj  4333  dfxp2  5114  brtxp  5784  endisj  6052  mucnc  6132  ce0nnul  6178  cenc  6182  ce2  6193