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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 10834 | . . . 4 ⊢ (𝜑 → (𝐴 ∪ 𝐵) ∈ 𝑈) |
| 5 | 1, 4 | wunpw 10831 | . . 3 ⊢ (𝜑 → 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈) |
| 6 | 1, 5 | wunpw 10831 | . 2 ⊢ (𝜑 → 𝒫 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈) |
| 7 | xpsspw 5796 | . . 3 ⊢ (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵) | |
| 8 | 7 | a1i 11 | . 2 ⊢ (𝜑 → (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵)) |
| 9 | 1, 6, 8 | wunss 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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