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Mirrors > Home > MPE Home > Th. List > gruwun | Structured version Visualization version GIF version |
Description: A nonempty Grothendieck universe is a weak universe. (Contributed by Mario Carneiro, 2-Jan-2017.) |
Ref | Expression |
---|---|
gruwun | ⊢ ((𝑈 ∈ Univ ∧ 𝑈 ≠ ∅) → 𝑈 ∈ WUni) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | grutr 10533 | . . 3 ⊢ (𝑈 ∈ Univ → Tr 𝑈) | |
2 | 1 | adantr 480 | . 2 ⊢ ((𝑈 ∈ Univ ∧ 𝑈 ≠ ∅) → Tr 𝑈) |
3 | simpr 484 | . 2 ⊢ ((𝑈 ∈ Univ ∧ 𝑈 ≠ ∅) → 𝑈 ≠ ∅) | |
4 | gruuni 10540 | . . . . 5 ⊢ ((𝑈 ∈ Univ ∧ 𝑥 ∈ 𝑈) → ∪ 𝑥 ∈ 𝑈) | |
5 | 4 | adantlr 711 | . . . 4 ⊢ (((𝑈 ∈ Univ ∧ 𝑈 ≠ ∅) ∧ 𝑥 ∈ 𝑈) → ∪ 𝑥 ∈ 𝑈) |
6 | grupw 10535 | . . . . 5 ⊢ ((𝑈 ∈ Univ ∧ 𝑥 ∈ 𝑈) → 𝒫 𝑥 ∈ 𝑈) | |
7 | 6 | adantlr 711 | . . . 4 ⊢ (((𝑈 ∈ Univ ∧ 𝑈 ≠ ∅) ∧ 𝑥 ∈ 𝑈) → 𝒫 𝑥 ∈ 𝑈) |
8 | grupr 10537 | . . . . . 6 ⊢ ((𝑈 ∈ Univ ∧ 𝑥 ∈ 𝑈 ∧ 𝑦 ∈ 𝑈) → {𝑥, 𝑦} ∈ 𝑈) | |
9 | 8 | ad4ant134 1172 | . . . . 5 ⊢ ((((𝑈 ∈ Univ ∧ 𝑈 ≠ ∅) ∧ 𝑥 ∈ 𝑈) ∧ 𝑦 ∈ 𝑈) → {𝑥, 𝑦} ∈ 𝑈) |
10 | 9 | ralrimiva 3109 | . . . 4 ⊢ (((𝑈 ∈ Univ ∧ 𝑈 ≠ ∅) ∧ 𝑥 ∈ 𝑈) → ∀𝑦 ∈ 𝑈 {𝑥, 𝑦} ∈ 𝑈) |
11 | 5, 7, 10 | 3jca 1126 | . . 3 ⊢ (((𝑈 ∈ Univ ∧ 𝑈 ≠ ∅) ∧ 𝑥 ∈ 𝑈) → (∪ 𝑥 ∈ 𝑈 ∧ 𝒫 𝑥 ∈ 𝑈 ∧ ∀𝑦 ∈ 𝑈 {𝑥, 𝑦} ∈ 𝑈)) |
12 | 11 | ralrimiva 3109 | . 2 ⊢ ((𝑈 ∈ Univ ∧ 𝑈 ≠ ∅) → ∀𝑥 ∈ 𝑈 (∪ 𝑥 ∈ 𝑈 ∧ 𝒫 𝑥 ∈ 𝑈 ∧ ∀𝑦 ∈ 𝑈 {𝑥, 𝑦} ∈ 𝑈)) |
13 | iswun 10444 | . . 3 ⊢ (𝑈 ∈ Univ → (𝑈 ∈ WUni ↔ (Tr 𝑈 ∧ 𝑈 ≠ ∅ ∧ ∀𝑥 ∈ 𝑈 (∪ 𝑥 ∈ 𝑈 ∧ 𝒫 𝑥 ∈ 𝑈 ∧ ∀𝑦 ∈ 𝑈 {𝑥, 𝑦} ∈ 𝑈)))) | |
14 | 13 | adantr 480 | . 2 ⊢ ((𝑈 ∈ Univ ∧ 𝑈 ≠ ∅) → (𝑈 ∈ WUni ↔ (Tr 𝑈 ∧ 𝑈 ≠ ∅ ∧ ∀𝑥 ∈ 𝑈 (∪ 𝑥 ∈ 𝑈 ∧ 𝒫 𝑥 ∈ 𝑈 ∧ ∀𝑦 ∈ 𝑈 {𝑥, 𝑦} ∈ 𝑈)))) |
15 | 2, 3, 12, 14 | mpbir3and 1340 | 1 ⊢ ((𝑈 ∈ Univ ∧ 𝑈 ≠ ∅) → 𝑈 ∈ WUni) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1085 ∈ wcel 2109 ≠ wne 2944 ∀wral 3065 ∅c0 4261 𝒫 cpw 4538 {cpr 4568 ∪ cuni 4844 Tr wtr 5195 WUnicwun 10440 Univcgru 10530 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-ral 3070 df-rex 3071 df-rab 3074 df-v 3432 df-sbc 3720 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-op 4573 df-uni 4845 df-iun 4931 df-br 5079 df-opab 5141 df-mpt 5162 df-tr 5196 df-id 5488 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-fv 6438 df-ov 7271 df-oprab 7272 df-mpo 7273 df-map 8591 df-wun 10442 df-gru 10531 |
This theorem is referenced by: (None) |
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