Theorem wunxp 9834

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

Step	Hyp	Ref	Expression
1		wun0.1	. 2 ⊢ (𝜑 → 𝑈 ∈ WUni)
2		wunop.2	. . . . 5 ⊢ (𝜑 → 𝐴 ∈ 𝑈)
3		wunop.3	. . . . 5 ⊢ (𝜑 → 𝐵 ∈ 𝑈)
4	1, 2, 3	wunun 9820	. . . 4 ⊢ (𝜑 → (𝐴 ∪ 𝐵) ∈ 𝑈)
5	1, 4	wunpw 9817	. . 3 ⊢ (𝜑 → 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈)
6	1, 5	wunpw 9817	. 2 ⊢ (𝜑 → 𝒫 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈)
7		xpsspw 5436	. . 3 ⊢ (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵)
8	7	a1i 11	. 2 ⊢ (𝜑 → (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵))
9	1, 6, 8	wunss 9822	1 ⊢ (𝜑 → (𝐴 × 𝐵) ∈ 𝑈)

Syntax hints:   → wi 4   ∈ wcel 2157   ∪ cun 3767   ⊆ wss 3769  𝒫 cpw 4349   × cxp 5310  WUnicwun 9810

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1891  ax-4 1905  ax-5 2006  ax-6 2072  ax-7 2107  ax-9 2166  ax-10 2185  ax-11 2200  ax-12 2213  ax-13 2377  ax-ext 2777  ax-sep 4975  ax-nul 4983  ax-pr 5097

This theorem depends on definitions:  df-bi 199  df-an 386  df-or 875  df-3an 1110  df-tru 1657  df-ex 1876  df-nf 1880  df-sb 2065  df-clab 2786  df-cleq 2792  df-clel 2795  df-nfc 2930  df-ne 2972  df-ral 3094  df-rex 3095  df-rab 3098  df-v 3387  df-dif 3772  df-un 3774  df-in 3776  df-ss 3783  df-nul 4116  df-if 4278  df-pw 4351  df-sn 4369  df-pr 4371  df-op 4375  df-uni 4629  df-opab 4906  df-tr 4946  df-xp 5318  df-rel 5319  df-wun 9812

This theorem is referenced by:  wunpm  9835  wuncnv  9840  wunco  9843  wuntpos  9844  tskxp  9897  wuncn  10279  wunfunc  16873  wunnat  16930  catcoppccl  17072  catcfuccl  17073  catcxpccl  17162