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Theorem ifexd 4519
Description: Existence of a conditional class (deduction form). (Contributed by BJ, 15-Aug-2024.)
Hypotheses
Ref Expression
ifexd.1  |-  ( ph  ->  A  e.  V )
ifexd.2  |-  ( ph  ->  B  e.  W )
Assertion
Ref Expression
ifexd  |-  ( ph  ->  if ( ps ,  A ,  B )  e.  _V )

Proof of Theorem ifexd
StepHypRef Expression
1 ifexd.1 . . 3  |-  ( ph  ->  A  e.  V )
2 ifexd.2 . . 3  |-  ( ph  ->  B  e.  W )
31, 2ifelpwund 4517 . 2  |-  ( ph  ->  if ( ps ,  A ,  B )  e.  ~P ( A  u.  B ) )
43elexd 2776 1  |-  ( ph  ->  if ( ps ,  A ,  B )  e.  _V )
Colors of variables: wff set class
Syntax hints:    -> wi 4    e. wcel 2167   _Vcvv 2763    u. cun 3155   ifcif 3561   ~Pcpw 3605
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 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4151  ax-pr 4242  ax-un 4468
This theorem depends on definitions:  df-bi 117  df-tru 1367  df-nf 1475  df-sb 1777  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-rex 2481  df-rab 2484  df-v 2765  df-un 3161  df-in 3163  df-ss 3170  df-if 3562  df-pw 3607  df-sn 3628  df-pr 3629  df-uni 3840
This theorem is referenced by:  ifexg  4520  gsumfzval  13010
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