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Theorem ifexd 4579
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 4577 . 2  |-  ( ph  ->  if ( ps ,  A ,  B )  e.  ~P ( A  u.  B ) )
43elexd 2814 1  |-  ( ph  ->  if ( ps ,  A ,  B )  e.  _V )
Colors of variables: wff set class
Syntax hints:    -> wi 4    e. wcel 2200   _Vcvv 2800    u. cun 3196   ifcif 3603   ~Pcpw 3650
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4205  ax-pr 4297  ax-un 4528
This theorem depends on definitions:  df-bi 117  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-rex 2514  df-rab 2517  df-v 2802  df-un 3202  df-in 3204  df-ss 3211  df-if 3604  df-pw 3652  df-sn 3673  df-pr 3674  df-uni 3892
This theorem is referenced by:  ifexg  4580  ccatlen  11165  ccatvalfn  11171  ccatalpha  11183  swrdval  11222  pfxval  11248  fnpfx  11251  gsumfzval  13467  vtxvalg  15860  iedgvalg  15861  vtxex  15862  iedgex  15863  edgvalg  15903
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