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Theorem wunxp 10848
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 10834 . . . 4 (𝜑 → (𝐴 ∪ 𝐵) ∈ 𝑈)
51, 4wunpw 10831 . . 3 (𝜑 → 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈)
61, 5wunpw 10831 . 2 (𝜑 → 𝒫 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈)
7 xpsspw 5796 . . 3 (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵)
87a1i 11 . 2 (𝜑 → (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵))
91, 6, 8wunss 10836 1 (𝜑 → (𝐴 × 𝐵) ∈ 𝑈)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∈ wcel 2147   ⊆ wss 3900   ∪ cun 4152  𝒫 cpw 4560   × cxp 5656  WUnicwun 10824
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 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-ext 2735  ax-sep 5255  ax-pr 5398
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 2102  df-clab 2742  df-cleq 2755  df-clel 2839  df-ne 2960  df-ral 3081  df-rex 3091  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4841  df-uni 4873  df-opab 5174  df-tr 5219  df-xp 5664  df-rel 5665  df-wun 10826
This theorem is used by:  wunpm  10849  wuncnv  10854  wunco  10857  wuntpos  10858  tskxp  10911  wuncn  11294  wunfunc  18126  wunnat  18184  catcoppccl  18342  catcfuccl  18343  catcxpccl  18431
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