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Theorem ifelpwung 4627
Description: Existence of a conditional class, quantitative version (closed form). (Contributed by BJ, 15-Aug-2024.)
Assertion
Ref Expression
ifelpwung ((𝐴𝑉𝐵𝑊) → if(𝜑, 𝐴, 𝐵) ∈ 𝒫 (𝐴𝐵))

Proof of Theorem ifelpwung
StepHypRef Expression
1 ifssun 3655 . 2 if(𝜑, 𝐴, 𝐵) ⊆ (𝐴𝐵)
2 unexg 4589 . . 3 ((𝐴𝑉𝐵𝑊) → (𝐴𝐵) ∈ V)
3 elpw2g 4292 . . 3 ((𝐴𝐵) ∈ V → (if(𝜑, 𝐴, 𝐵) ∈ 𝒫 (𝐴𝐵) ↔ if(𝜑, 𝐴, 𝐵) ⊆ (𝐴𝐵)))
42, 3syl 14 . 2 ((𝐴𝑉𝐵𝑊) → (if(𝜑, 𝐴, 𝐵) ∈ 𝒫 (𝐴𝐵) ↔ if(𝜑, 𝐴, 𝐵) ⊆ (𝐴𝐵)))
51, 4mpbiri 168 1 ((𝐴𝑉𝐵𝑊) → if(𝜑, 𝐴, 𝐵) ∈ 𝒫 (𝐴𝐵))
Colors of variables:    wff set class
This proof depends on syntax axioms:  wi 4  wa 104  wb 105  wcel 2209  Vcvv 2821  cun 3218  wss 3220  ifcif 3638  𝒫 cpw 3688
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pr 4346  ax-un 4578
This proof depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-rex 2534  df-rab 2537  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-if 3639  df-pw 3690  df-sn 3715  df-pr 3716  df-uni 3936
This theorem is used by:  ifelpwund  4628  ifelpwun  4629
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