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| Mirrors > Home > MPE Home > Th. List > wunf | Structured version Visualization version GIF version | ||
| Description: A weak universe is closed under functions with known domain and codomain. (Contributed by Mario Carneiro, 2-Jan-2017.) |
| Ref | Expression |
|---|---|
| wun0.1 | ⊢ (𝜑 → 𝑈 ∈ WUni) |
| wunop.2 | ⊢ (𝜑 → 𝐴 ∈ 𝑈) |
| wunop.3 | ⊢ (𝜑 → 𝐵 ∈ 𝑈) |
| wunf.3 | ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) |
| Ref | Expression |
|---|---|
| wunf | ⊢ (𝜑 → 𝐹 ∈ 𝑈) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | wun0.1 | . . 3 ⊢ (𝜑 → 𝑈 ∈ WUni) | |
| 2 | wunop.3 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝑈) | |
| 3 | wunop.2 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑈) | |
| 4 | 1, 2, 3 | wunmap 10782 | . . 3 ⊢ (𝜑 → (𝐵 ↑m 𝐴) ∈ 𝑈) |
| 5 | 1, 4 | wunelss 10764 | . 2 ⊢ (𝜑 → (𝐵 ↑m 𝐴) ⊆ 𝑈) |
| 6 | wunf.3 | . . 3 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) | |
| 7 | 2, 3 | elmapd 8838 | . . 3 ⊢ (𝜑 → (𝐹 ∈ (𝐵 ↑m 𝐴) ↔ 𝐹:𝐴⟶𝐵)) |
| 8 | 6, 7 | mpbird 260 | . 2 ⊢ (𝜑 → 𝐹 ∈ (𝐵 ↑m 𝐴)) |
| 9 | 5, 8 | sseldd 3931 | 1 ⊢ (𝜑 → 𝐹 ∈ 𝑈) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2145 ⟶wf 6523 (class class class)co 7408 ↑m cmap 8825 WUnicwun 10756 |
| 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-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 |
| 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-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5542 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-fv 6535 df-ov 7411 df-oprab 7412 df-mpo 7413 df-1st 7984 df-2nd 7985 df-map 8827 df-pm 8828 df-wun 10758 |
| This theorem is used by: wunndx 17334 wunnat 18095 catcoppccl 18253 catcfuccl 18254 catcxpccl 18342 |
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