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Mirrors > Home > MPE Home > Th. List > cnrest | Structured version Visualization version GIF version |
Description: Continuity of a restriction from a subspace. (Contributed by Jeff Hankins, 11-Jul-2009.) (Revised by Mario Carneiro, 21-Aug-2015.) |
Ref | Expression |
---|---|
cnrest.1 | ⊢ 𝑋 = ∪ 𝐽 |
Ref | Expression |
---|---|
cnrest | ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnrest.1 | . . . . 5 ⊢ 𝑋 = ∪ 𝐽 | |
2 | eqid 2738 | . . . . 5 ⊢ ∪ 𝐾 = ∪ 𝐾 | |
3 | 1, 2 | cnf 22305 | . . . 4 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐹:𝑋⟶∪ 𝐾) |
4 | 3 | adantr 480 | . . 3 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐹:𝑋⟶∪ 𝐾) |
5 | simpr 484 | . . 3 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐴 ⊆ 𝑋) | |
6 | 4, 5 | fssresd 6625 | . 2 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐹 ↾ 𝐴):𝐴⟶∪ 𝐾) |
7 | cnvresima 6122 | . . . 4 ⊢ (◡(𝐹 ↾ 𝐴) “ 𝑜) = ((◡𝐹 “ 𝑜) ∩ 𝐴) | |
8 | cntop1 22299 | . . . . . . 7 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐽 ∈ Top) | |
9 | 8 | adantr 480 | . . . . . 6 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐽 ∈ Top) |
10 | 9 | adantr 480 | . . . . 5 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → 𝐽 ∈ Top) |
11 | 1 | topopn 21963 | . . . . . . . 8 ⊢ (𝐽 ∈ Top → 𝑋 ∈ 𝐽) |
12 | ssexg 5242 | . . . . . . . . 9 ⊢ ((𝐴 ⊆ 𝑋 ∧ 𝑋 ∈ 𝐽) → 𝐴 ∈ V) | |
13 | 12 | ancoms 458 | . . . . . . . 8 ⊢ ((𝑋 ∈ 𝐽 ∧ 𝐴 ⊆ 𝑋) → 𝐴 ∈ V) |
14 | 11, 13 | sylan 579 | . . . . . . 7 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ⊆ 𝑋) → 𝐴 ∈ V) |
15 | 8, 14 | sylan 579 | . . . . . 6 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐴 ∈ V) |
16 | 15 | adantr 480 | . . . . 5 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → 𝐴 ∈ V) |
17 | cnima 22324 | . . . . . 6 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝑜 ∈ 𝐾) → (◡𝐹 “ 𝑜) ∈ 𝐽) | |
18 | 17 | adantlr 711 | . . . . 5 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → (◡𝐹 “ 𝑜) ∈ 𝐽) |
19 | elrestr 17056 | . . . . 5 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ V ∧ (◡𝐹 “ 𝑜) ∈ 𝐽) → ((◡𝐹 “ 𝑜) ∩ 𝐴) ∈ (𝐽 ↾t 𝐴)) | |
20 | 10, 16, 18, 19 | syl3anc 1369 | . . . 4 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → ((◡𝐹 “ 𝑜) ∩ 𝐴) ∈ (𝐽 ↾t 𝐴)) |
21 | 7, 20 | eqeltrid 2843 | . . 3 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → (◡(𝐹 ↾ 𝐴) “ 𝑜) ∈ (𝐽 ↾t 𝐴)) |
22 | 21 | ralrimiva 3107 | . 2 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → ∀𝑜 ∈ 𝐾 (◡(𝐹 ↾ 𝐴) “ 𝑜) ∈ (𝐽 ↾t 𝐴)) |
23 | 1 | toptopon 21974 | . . . . 5 ⊢ (𝐽 ∈ Top ↔ 𝐽 ∈ (TopOn‘𝑋)) |
24 | 8, 23 | sylib 217 | . . . 4 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐽 ∈ (TopOn‘𝑋)) |
25 | resttopon 22220 | . . . 4 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐴 ⊆ 𝑋) → (𝐽 ↾t 𝐴) ∈ (TopOn‘𝐴)) | |
26 | 24, 25 | sylan 579 | . . 3 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐽 ↾t 𝐴) ∈ (TopOn‘𝐴)) |
27 | cntop2 22300 | . . . . 5 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top) | |
28 | 27 | adantr 480 | . . . 4 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐾 ∈ Top) |
29 | 2 | toptopon 21974 | . . . 4 ⊢ (𝐾 ∈ Top ↔ 𝐾 ∈ (TopOn‘∪ 𝐾)) |
30 | 28, 29 | sylib 217 | . . 3 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐾 ∈ (TopOn‘∪ 𝐾)) |
31 | iscn 22294 | . . 3 ⊢ (((𝐽 ↾t 𝐴) ∈ (TopOn‘𝐴) ∧ 𝐾 ∈ (TopOn‘∪ 𝐾)) → ((𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾) ↔ ((𝐹 ↾ 𝐴):𝐴⟶∪ 𝐾 ∧ ∀𝑜 ∈ 𝐾 (◡(𝐹 ↾ 𝐴) “ 𝑜) ∈ (𝐽 ↾t 𝐴)))) | |
32 | 26, 30, 31 | syl2anc 583 | . 2 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → ((𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾) ↔ ((𝐹 ↾ 𝐴):𝐴⟶∪ 𝐾 ∧ ∀𝑜 ∈ 𝐾 (◡(𝐹 ↾ 𝐴) “ 𝑜) ∈ (𝐽 ↾t 𝐴)))) |
33 | 6, 22, 32 | mpbir2and 709 | 1 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ∀wral 3063 Vcvv 3422 ∩ cin 3882 ⊆ wss 3883 ∪ cuni 4836 ◡ccnv 5579 ↾ cres 5582 “ cima 5583 ⟶wf 6414 ‘cfv 6418 (class class class)co 7255 ↾t crest 17048 Topctop 21950 TopOnctopon 21967 Cn ccn 22283 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-map 8575 df-en 8692 df-fin 8695 df-fi 9100 df-rest 17050 df-topgen 17071 df-top 21951 df-topon 21968 df-bases 22004 df-cn 22286 |
This theorem is referenced by: resthauslem 22422 imacmp 22456 connima 22484 kgencn2 22616 kgencn3 22617 xkopjcn 22715 cnmpt1res 22735 cnmpt2res 22736 qtoprest 22776 hmeores 22830 ftalem3 26129 rmulccn 31780 raddcn 31781 xrge0mulc1cn 31793 rrhre 31871 cvmliftmolem1 33143 cvmlift2lem9a 33165 cvmlift2lem9 33173 ivthALT 34451 broucube 35738 areacirclem2 35793 cnres2 35848 stoweidlem28 43459 dirkercncflem2 43535 |
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