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Theorem wunxp 10802
Description: A weak universe is closed under cartesian products. (Contributed by Mario Carneiro, 2-Jan-2017.)
Hypotheses
Ref Expression
wun0.1 (𝜑 → 𝑈 ∈ WUni)
wunop.2 (𝜑 → 𝐴 ∈ 𝑈)
wunop.3 (𝜑 → 𝐵 ∈ 𝑈)
Assertion
Ref Expression
wunxp (𝜑 → (𝐴 × 𝐵) ∈ 𝑈)

Proof of Theorem wunxp
StepHypRef Expression
1 wun0.1 . 2 (𝜑 → 𝑈 ∈ WUni)
2 wunop.2 . . . . 5 (𝜑 → 𝐴 ∈ 𝑈)
3 wunop.3 . . . . 5 (𝜑 → 𝐵 ∈ 𝑈)
41, 2, 3wunun 10788 . . . 4 (𝜑 → (𝐴 ∪ 𝐵) ∈ 𝑈)
51, 4wunpw 10785 . . 3 (𝜑 → 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈)
61, 5wunpw 10785 . 2 (𝜑 → 𝒫 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈)
7 xpsspw 5787 . . 3 (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵)
87a1i 11 . 2 (𝜑 → (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵))
91, 6, 8wunss 10790 1 (𝜑 → (𝐴 × 𝐵) ∈ 𝑈)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∈ wcel 2145   ∪ cun 3897   ⊆ wss 3899  𝒫 cpw 4557   × cxp 5649  WUnicwun 10778
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-ext 2733  ax-sep 5249  ax-pr 5391
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2740  df-cleq 2753  df-clel 2836  df-ne 2957  df-ral 3078  df-rex 3088  df-rab 3414  df-v 3453  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-opab 5168  df-tr 5213  df-xp 5657  df-rel 5658  df-wun 10780
This theorem is used by:  wunpm  10803  wuncnv  10808  wunco  10811  wuntpos  10812  tskxp  10865  wuncn  11248  wunfunc  18069  wunnat  18127  catcoppccl  18285  catcfuccl  18286  catcxpccl  18374
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