MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  wunxp Structured version   Visualization version   GIF version

Theorem wunxp 10813
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 10799 . . . 4 (𝜑 → (𝐴 ∪ 𝐵) ∈ 𝑈)
51, 4wunpw 10796 . . 3 (𝜑 → 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈)
61, 5wunpw 10796 . 2 (𝜑 → 𝒫 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈)
7 xpsspw 5786 . . 3 (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵)
87a1i 11 . 2 (𝜑 → (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵))
91, 6, 8wunss 10801 1 (𝜑 → (𝐴 × 𝐵) ∈ 𝑈)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∈ wcel 2144   ⊆ wss 3895   ∪ cun 4149  𝒫 cpw 4556   × cxp 5648  WUnicwun 10789
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-ext 2732  ax-sep 5248  ax-pr 5390
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-sb 2099  df-clab 2739  df-cleq 2752  df-clel 2835  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-opab 5167  df-tr 5212  df-xp 5656  df-rel 5657  df-wun 10791
This theorem is used by:  wunpm  10814  wuncnv  10819  wunco  10822  wuntpos  10823  tskxp  10876  wuncn  11259  wunfunc  18082  wunnat  18140  catcoppccl  18298  catcfuccl  18299  catcxpccl  18387
  Copyright terms: Public domain W3C validator