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Theorem ifexd 4604
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 4602 . 2 (𝜑 → if(𝜓, 𝐴, 𝐵) ∈ 𝒫 (𝐴𝐵))
43elexd 2826 1 (𝜑 → if(𝜓, 𝐴, 𝐵) ∈ V)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2203  Vcvv 2812  cun 3208  ifcif 3619  𝒫 cpw 3668
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4227  ax-pr 4321  ax-un 4553
This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-rex 2526  df-rab 2529  df-v 2814  df-un 3214  df-in 3216  df-ss 3223  df-if 3620  df-pw 3670  df-sn 3694  df-pr 3695  df-uni 3914
This theorem is referenced by:  ifexg  4605  ccatlen  11276  ccatvalfn  11282  ccatalpha  11294  swrdval  11333  pfxval  11359  fnpfx  11362  gsumfzval  13593  vtxvalg  15998  iedgvalg  15999  vtxex  16000  iedgex  16001  edgvalg  16041
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