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| Mirrors > Home > MPE Home > Th. List > restsspw | Structured version Visualization version GIF version | ||
| Description: The subspace topology is a collection of subsets of the restriction set. (Contributed by Mario Carneiro, 13-Aug-2015.) |
| Ref | Expression |
|---|---|
| restsspw | ⊢ (𝐽 ↾t 𝐴) ⊆ 𝒫 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | n0i 4301 | . . . . . . 7 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → ¬ (𝐽 ↾t 𝐴) = ∅) | |
| 2 | restfn 17473 | . . . . . . . . 9 ⊢ ↾t Fn (V × V) | |
| 3 | fndm 6636 | . . . . . . . . 9 ⊢ ( ↾t Fn (V × V) → dom ↾t = (V × V)) | |
| 4 | 2, 3 | ax-mp 5 | . . . . . . . 8 ⊢ dom ↾t = (V × V) |
| 5 | 4 | ndmov 7592 | . . . . . . 7 ⊢ (¬ (𝐽 ∈ V ∧ 𝐴 ∈ V) → (𝐽 ↾t 𝐴) = ∅) |
| 6 | 1, 5 | nsyl2 142 | . . . . . 6 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → (𝐽 ∈ V ∧ 𝐴 ∈ V)) |
| 7 | elrest 17476 | . . . . . 6 ⊢ ((𝐽 ∈ V ∧ 𝐴 ∈ V) → (𝑥 ∈ (𝐽 ↾t 𝐴) ↔ ∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴))) | |
| 8 | 6, 7 | syl 18 | . . . . 5 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → (𝑥 ∈ (𝐽 ↾t 𝐴) ↔ ∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴))) |
| 9 | 8 | ibi 270 | . . . 4 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → ∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴)) |
| 10 | inss2 4198 | . . . . . 6 ⊢ (𝑦 ∩ 𝐴) ⊆ 𝐴 | |
| 11 | sseq1 3970 | . . . . . 6 ⊢ (𝑥 = (𝑦 ∩ 𝐴) → (𝑥 ⊆ 𝐴 ↔ (𝑦 ∩ 𝐴) ⊆ 𝐴)) | |
| 12 | 10, 11 | mpbiri 261 | . . . . 5 ⊢ (𝑥 = (𝑦 ∩ 𝐴) → 𝑥 ⊆ 𝐴) |
| 13 | 12 | rexlimivw 3168 | . . . 4 ⊢ (∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴) → 𝑥 ⊆ 𝐴) |
| 14 | 9, 13 | syl 18 | . . 3 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → 𝑥 ⊆ 𝐴) |
| 15 | velpw 4569 | . . 3 ⊢ (𝑥 ∈ 𝒫 𝐴 ↔ 𝑥 ⊆ 𝐴) | |
| 16 | 14, 15 | sylibr 237 | . 2 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → 𝑥 ∈ 𝒫 𝐴) |
| 17 | 16 | ssriv 3949 | 1 ⊢ (𝐽 ↾t 𝐴) ⊆ 𝒫 𝐴 |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 209 ∧ wa 400 = wceq 1567 ∈ wcel 2149 ∃wrex 3095 Vcvv 3463 ∩ cin 3912 ⊆ wss 3913 ∅c0 4294 𝒫 cpw 4564 × cxp 5657 dom cdm 5659 Fn wfn 6528 (class class class)co 7408 ↾t crest 17469 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5239 ax-sep 5258 ax-nul 5268 ax-pr 5402 ax-un 7730 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-ov 7411 df-oprab 7412 df-mpo 7413 df-1st 7982 df-2nd 7983 df-rest 17471 |
| This theorem is referenced by: 1stckgenlem 23675 prdstopn 23750 trfbas2 23965 trfil1 24008 trfil2 24009 fgtr 24012 trust 24351 zdis 24939 cnambfre 38202 dvdmsscn 46535 dvnmptconst 46540 dvnxpaek 46541 dvnmul 46542 dvnprodlem3 46547 |
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