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| Mirrors > Home > MPE Home > Th. List > wunxp | Structured version Visualization version GIF version | ||
| Description: A weak universe is closed under cartesian products. (Contributed by Mario Carneiro, 2-Jan-2017.) |
| Ref | Expression |
|---|---|
| wun0.1 | ⊢ (𝜑 → 𝑈 ∈ WUni) |
| wunop.2 | ⊢ (𝜑 → 𝐴 ∈ 𝑈) |
| wunop.3 | ⊢ (𝜑 → 𝐵 ∈ 𝑈) |
| Ref | Expression |
|---|---|
| wunxp | ⊢ (𝜑 → (𝐴 × 𝐵) ∈ 𝑈) |
| 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 10719 | . . . 4 ⊢ (𝜑 → (𝐴 ∪ 𝐵) ∈ 𝑈) |
| 5 | 1, 4 | wunpw 10716 | . . 3 ⊢ (𝜑 → 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈) |
| 6 | 1, 5 | wunpw 10716 | . 2 ⊢ (𝜑 → 𝒫 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈) |
| 7 | xpsspw 5790 | . . 3 ⊢ (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵) | |
| 8 | 7 | a1i 11 | . 2 ⊢ (𝜑 → (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵)) |
| 9 | 1, 6, 8 | wunss 10721 | 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 5653 WUnicwun 10709 |
| 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 2732 ax-sep 5251 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 2100 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-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 5661 df-rel 5662 df-wun 10711 |
| This theorem is used by: wunpm 10734 wuncnv 10739 wunco 10742 wuntpos 10743 tskxp 10796 wuncn 11179 wunfunc 17990 wunnat 18048 catcoppccl 18206 catcfuccl 18207 catcxpccl 18295 |
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