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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 10624 | . . . 4 ⊢ (𝜑 → (𝐴 ∪ 𝐵) ∈ 𝑈) |
| 5 | 1, 4 | wunpw 10621 | . . 3 ⊢ (𝜑 → 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈) |
| 6 | 1, 5 | wunpw 10621 | . 2 ⊢ (𝜑 → 𝒫 𝒫 (𝐴 ∪ 𝐵) ∈ 𝑈) |
| 7 | xpsspw 5758 | . . 3 ⊢ (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵) | |
| 8 | 7 | a1i 11 | . 2 ⊢ (𝜑 → (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵)) |
| 9 | 1, 6, 8 | wunss 10626 | 1 ⊢ (𝜑 → (𝐴 × 𝐵) ∈ 𝑈) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2114 ∪ cun 3888 ⊆ wss 3890 𝒫 cpw 4542 × cxp 5622 WUnicwun 10614 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5231 ax-pr 5370 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-opab 5149 df-tr 5194 df-xp 5630 df-rel 5631 df-wun 10616 |
| This theorem is referenced by: wunpm 10639 wuncnv 10644 wunco 10647 wuntpos 10648 tskxp 10701 wuncn 11084 wunfunc 17859 wunnat 17917 catcoppccl 18075 catcfuccl 18076 catcxpccl 18164 |
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