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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 4333 | . . . . . . 7 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → ¬ (𝐽 ↾t 𝐴) = ∅) | |
2 | restfn 17369 | . . . . . . . . 9 ⊢ ↾t Fn (V × V) | |
3 | fndm 6652 | . . . . . . . . 9 ⊢ ( ↾t Fn (V × V) → dom ↾t = (V × V)) | |
4 | 2, 3 | ax-mp 5 | . . . . . . . 8 ⊢ dom ↾t = (V × V) |
5 | 4 | ndmov 7590 | . . . . . . 7 ⊢ (¬ (𝐽 ∈ V ∧ 𝐴 ∈ V) → (𝐽 ↾t 𝐴) = ∅) |
6 | 1, 5 | nsyl2 141 | . . . . . 6 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → (𝐽 ∈ V ∧ 𝐴 ∈ V)) |
7 | elrest 17372 | . . . . . 6 ⊢ ((𝐽 ∈ V ∧ 𝐴 ∈ V) → (𝑥 ∈ (𝐽 ↾t 𝐴) ↔ ∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴))) | |
8 | 6, 7 | syl 17 | . . . . 5 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → (𝑥 ∈ (𝐽 ↾t 𝐴) ↔ ∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴))) |
9 | 8 | ibi 266 | . . . 4 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → ∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴)) |
10 | inss2 4229 | . . . . . 6 ⊢ (𝑦 ∩ 𝐴) ⊆ 𝐴 | |
11 | sseq1 4007 | . . . . . 6 ⊢ (𝑥 = (𝑦 ∩ 𝐴) → (𝑥 ⊆ 𝐴 ↔ (𝑦 ∩ 𝐴) ⊆ 𝐴)) | |
12 | 10, 11 | mpbiri 257 | . . . . 5 ⊢ (𝑥 = (𝑦 ∩ 𝐴) → 𝑥 ⊆ 𝐴) |
13 | 12 | rexlimivw 3151 | . . . 4 ⊢ (∃𝑦 ∈ 𝐽 𝑥 = (𝑦 ∩ 𝐴) → 𝑥 ⊆ 𝐴) |
14 | 9, 13 | syl 17 | . . 3 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → 𝑥 ⊆ 𝐴) |
15 | velpw 4607 | . . 3 ⊢ (𝑥 ∈ 𝒫 𝐴 ↔ 𝑥 ⊆ 𝐴) | |
16 | 14, 15 | sylibr 233 | . 2 ⊢ (𝑥 ∈ (𝐽 ↾t 𝐴) → 𝑥 ∈ 𝒫 𝐴) |
17 | 16 | ssriv 3986 | 1 ⊢ (𝐽 ↾t 𝐴) ⊆ 𝒫 𝐴 |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 205 ∧ wa 396 = wceq 1541 ∈ wcel 2106 ∃wrex 3070 Vcvv 3474 ∩ cin 3947 ⊆ wss 3948 ∅c0 4322 𝒫 cpw 4602 × cxp 5674 dom cdm 5676 Fn wfn 6538 (class class class)co 7408 ↾t crest 17365 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pr 5427 ax-un 7724 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-ral 3062 df-rex 3071 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5574 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-ov 7411 df-oprab 7412 df-mpo 7413 df-1st 7974 df-2nd 7975 df-rest 17367 |
This theorem is referenced by: 1stckgenlem 23056 prdstopn 23131 trfbas2 23346 trfil1 23389 trfil2 23390 fgtr 23393 trust 23733 zdis 24331 cnambfre 36531 dvdmsscn 44642 dvnmptconst 44647 dvnxpaek 44648 dvnmul 44649 dvnprodlem3 44654 |
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