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Theorem exinst 28066
Description: Existential Instantiation. Virtual deduction form of exlimexi 27951. (Contributed by Alan Sare, 21-Apr-2013.) (Proof modification is discouraged.) (New usage is discouraged.)
Hypotheses
Ref Expression
exinst.1  |-  ( ps 
->  A. x ps )
exinst.2  |-  (. E. x ph ,. ph  ->.  ps ).
Assertion
Ref Expression
exinst  |-  ( E. x ph  ->  ps )

Proof of Theorem exinst
StepHypRef Expression
1 exinst.1 . 2  |-  ( ps 
->  A. x ps )
2 exinst.2 . . 3  |-  (. E. x ph ,. ph  ->.  ps ).
32dfvd2i 28018 . 2  |-  ( E. x ph  ->  ( ph  ->  ps ) )
41, 3exlimexi 27951 1  |-  ( E. x ph  ->  ps )
Colors of variables: wff set class
Syntax hints:    -> wi 4   A.wal 1546   E.wex 1547   (.wvd2 28010
This theorem is referenced by:  sb5ALTVD  28366
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1552  ax-5 1563  ax-17 1623  ax-9 1661  ax-8 1682  ax-6 1736  ax-11 1753
This theorem depends on definitions:  df-bi 178  df-an 361  df-ex 1548  df-nf 1551  df-vd2 28011
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