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| Mirrors > Home > MPE Home > Th. List > wunress | Structured version Visualization version GIF version | ||
| Description: Closure of structure restriction in a weak universe. (Contributed by Mario Carneiro, 12-Jan-2017.) (Proof shortened by AV, 28-Oct-2024.) |
| Ref | Expression |
|---|---|
| wunress.1 | ⊢ (𝜑 → 𝑈 ∈ WUni) |
| wunress.2 | ⊢ (𝜑 → ω ∈ 𝑈) |
| wunress.3 | ⊢ (𝜑 → 𝑊 ∈ 𝑈) |
| Ref | Expression |
|---|---|
| wunress | ⊢ (𝜑 → (𝑊 ↾s 𝐴) ∈ 𝑈) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | wunress.3 | . . . . 5 ⊢ (𝜑 → 𝑊 ∈ 𝑈) | |
| 2 | eqid 2763 | . . . . . 6 ⊢ (𝑊 ↾s 𝐴) = (𝑊 ↾s 𝐴) | |
| 3 | eqid 2763 | . . . . . 6 ⊢ (Base‘𝑊) = (Base‘𝑊) | |
| 4 | 2, 3 | ressval 17288 | . . . . 5 ⊢ ((𝑊 ∈ 𝑈 ∧ 𝐴 ∈ V) → (𝑊 ↾s 𝐴) = if((Base‘𝑊) ⊆ 𝐴, 𝑊, (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉))) |
| 5 | 1, 4 | sylan 591 | . . . 4 ⊢ ((𝜑 ∧ 𝐴 ∈ V) → (𝑊 ↾s 𝐴) = if((Base‘𝑊) ⊆ 𝐴, 𝑊, (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉))) |
| 6 | wunress.1 | . . . . . . 7 ⊢ (𝜑 → 𝑈 ∈ WUni) | |
| 7 | wunress.2 | . . . . . . . . 9 ⊢ (𝜑 → ω ∈ 𝑈) | |
| 8 | 6, 7 | basndxelwund 17275 | . . . . . . . 8 ⊢ (𝜑 → (Base‘ndx) ∈ 𝑈) |
| 9 | incom 4162 | . . . . . . . . 9 ⊢ (𝐴 ∩ (Base‘𝑊)) = ((Base‘𝑊) ∩ 𝐴) | |
| 10 | baseid 17267 | . . . . . . . . . . 11 ⊢ Base = Slot (Base‘ndx) | |
| 11 | 10, 6, 1 | wunstr 17243 | . . . . . . . . . 10 ⊢ (𝜑 → (Base‘𝑊) ∈ 𝑈) |
| 12 | 6, 11 | wunin 10693 | . . . . . . . . 9 ⊢ (𝜑 → ((Base‘𝑊) ∩ 𝐴) ∈ 𝑈) |
| 13 | 9, 12 | eqeltrid 2867 | . . . . . . . 8 ⊢ (𝜑 → (𝐴 ∩ (Base‘𝑊)) ∈ 𝑈) |
| 14 | 6, 8, 13 | wunop 10702 | . . . . . . 7 ⊢ (𝜑 → 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉 ∈ 𝑈) |
| 15 | 6, 1, 14 | wunsets 17232 | . . . . . 6 ⊢ (𝜑 → (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉) ∈ 𝑈) |
| 16 | 1, 15 | ifcld 4534 | . . . . 5 ⊢ (𝜑 → if((Base‘𝑊) ⊆ 𝐴, 𝑊, (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉)) ∈ 𝑈) |
| 17 | 16 | adantr 485 | . . . 4 ⊢ ((𝜑 ∧ 𝐴 ∈ V) → if((Base‘𝑊) ⊆ 𝐴, 𝑊, (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ (Base‘𝑊))〉)) ∈ 𝑈) |
| 18 | 5, 17 | eqeltrd 2863 | . . 3 ⊢ ((𝜑 ∧ 𝐴 ∈ V) → (𝑊 ↾s 𝐴) ∈ 𝑈) |
| 19 | 18 | ex 417 | . 2 ⊢ (𝜑 → (𝐴 ∈ V → (𝑊 ↾s 𝐴) ∈ 𝑈)) |
| 20 | 6 | wun0 10698 | . . 3 ⊢ (𝜑 → ∅ ∈ 𝑈) |
| 21 | reldmress 17287 | . . . . 5 ⊢ Rel dom ↾s | |
| 22 | 21 | ovprc2 7450 | . . . 4 ⊢ (¬ 𝐴 ∈ V → (𝑊 ↾s 𝐴) = ∅) |
| 23 | 22 | eleq1d 2848 | . . 3 ⊢ (¬ 𝐴 ∈ V → ((𝑊 ↾s 𝐴) ∈ 𝑈 ↔ ∅ ∈ 𝑈)) |
| 24 | 20, 23 | syl5ibrcom 250 | . 2 ⊢ (𝜑 → (¬ 𝐴 ∈ V → (𝑊 ↾s 𝐴) ∈ 𝑈)) |
| 25 | 19, 24 | pm2.61d 181 | 1 ⊢ (𝜑 → (𝑊 ↾s 𝐴) ∈ 𝑈) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 400 = wceq 1570 ∈ wcel 2143 Vcvv 3455 ∩ cin 3904 ⊆ wss 3905 ∅c0 4286 ifcif 4487 〈cop 4595 ‘cfv 6536 (class class class)co 7410 ωcom 7858 WUnicwun 10680 sSet csts 17218 ndxcnx 17248 Basecbs 17264 ↾s cress 17285 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-inf2 9606 ax-cnex 11151 ax-1cn 11153 ax-addcl 11155 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-int 4913 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-1st 7982 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-1o 8449 df-oadd 8453 df-omul 8454 df-er 8690 df-ec 8692 df-qs 8696 df-map 8822 df-pm 8823 df-wun 10682 df-ni 10852 df-pli 10853 df-mi 10854 df-lti 10855 df-plpq 10888 df-mpq 10889 df-ltpq 10890 df-enq 10891 df-nq 10892 df-erq 10893 df-plq 10894 df-mq 10895 df-1nq 10896 df-rq 10897 df-ltnq 10898 df-np 10961 df-plp 10963 df-ltp 10965 df-enr 11035 df-nr 11036 df-c 11101 df-nn 12229 df-sets 17219 df-slot 17237 df-ndx 17249 df-base 17265 df-ress 17286 |
| This theorem is referenced by: (None) |
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