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Theorem ifexd 4480
Description: Existence of a conditional class (deduction form). (Contributed by BJ, 15-Aug-2024.)
Hypotheses
Ref Expression
ifexd.1 (𝜑𝐴𝑉)
ifexd.2 (𝜑𝐵𝑊)
Assertion
Ref Expression
ifexd (𝜑 → if(𝜓, 𝐴, 𝐵) ∈ V)

Proof of Theorem ifexd
StepHypRef Expression
1 ifexd.1 . . 3 (𝜑𝐴𝑉)
2 ifexd.2 . . 3 (𝜑𝐵𝑊)
31, 2ifelpwund 4478 . 2 (𝜑 → if(𝜓, 𝐴, 𝐵) ∈ 𝒫 (𝐴𝐵))
43elexd 2750 1 (𝜑 → if(𝜓, 𝐴, 𝐵) ∈ V)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2148  Vcvv 2737  cun 3127  ifcif 3534  𝒫 cpw 3574
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 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-sep 4118  ax-pr 4205  ax-un 4429
This theorem depends on definitions:  df-bi 117  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-rex 2461  df-rab 2464  df-v 2739  df-un 3133  df-in 3135  df-ss 3142  df-if 3535  df-pw 3576  df-sn 3597  df-pr 3598  df-uni 3808
This theorem is referenced by: (None)
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