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Mirrors > Home > MPE Home > Th. List > resttop | Structured version Visualization version GIF version |
Description: A subspace topology is a topology. Definition of subspace topology in [Munkres] p. 89. 𝐴 is normally a subset of the base set of 𝐽. (Contributed by FL, 15-Apr-2007.) (Revised by Mario Carneiro, 1-May-2015.) |
Ref | Expression |
---|---|
resttop | ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (𝐽 ↾t 𝐴) ∈ Top) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | tgrest 22218 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘(𝐽 ↾t 𝐴)) = ((topGen‘𝐽) ↾t 𝐴)) | |
2 | tgtop 22031 | . . . . 5 ⊢ (𝐽 ∈ Top → (topGen‘𝐽) = 𝐽) | |
3 | 2 | adantr 480 | . . . 4 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘𝐽) = 𝐽) |
4 | 3 | oveq1d 7270 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → ((topGen‘𝐽) ↾t 𝐴) = (𝐽 ↾t 𝐴)) |
5 | 1, 4 | eqtrd 2778 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘(𝐽 ↾t 𝐴)) = (𝐽 ↾t 𝐴)) |
6 | topbas 22030 | . . . 4 ⊢ (𝐽 ∈ Top → 𝐽 ∈ TopBases) | |
7 | 6 | adantr 480 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → 𝐽 ∈ TopBases) |
8 | restbas 22217 | . . 3 ⊢ (𝐽 ∈ TopBases → (𝐽 ↾t 𝐴) ∈ TopBases) | |
9 | tgcl 22027 | . . 3 ⊢ ((𝐽 ↾t 𝐴) ∈ TopBases → (topGen‘(𝐽 ↾t 𝐴)) ∈ Top) | |
10 | 7, 8, 9 | 3syl 18 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘(𝐽 ↾t 𝐴)) ∈ Top) |
11 | 5, 10 | eqeltrrd 2840 | 1 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (𝐽 ↾t 𝐴) ∈ Top) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ‘cfv 6418 (class class class)co 7255 ↾t crest 17048 topGenctg 17065 Topctop 21950 TopBasesctb 22003 |
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-en 8692 df-fin 8695 df-fi 9100 df-rest 17050 df-topgen 17071 df-top 21951 df-bases 22004 |
This theorem is referenced by: resttopon 22220 resttopon2 22227 rest0 22228 restcld 22231 neitr 22239 restcls 22240 restntr 22241 ordtrest 22261 cmpsub 22459 fiuncmp 22463 1stcrest 22512 subislly 22540 llyrest 22544 nllyrest 22545 toplly 22549 cldllycmp 22554 kgencmp2 22605 llycmpkgen2 22609 1stckgen 22613 txkgen 22711 cnextfres1 23127 zdis 23885 cnmpopc 23997 dvbss 24970 dvreslem 24978 dvres2lem 24979 dvcnp2 24989 dvmptres 25032 ulmdvlem3 25466 psercn 25490 abelth 25505 zarmxt1 31732 ordtrestNEW 31773 cvxpconn 33104 cvmscld 33135 ptrest 35703 poimirlem29 35733 cnambfre 35752 limcresiooub 43073 limcresioolb 43074 cncfuni 43317 cncfiooicclem1 43324 fourierdlem32 43570 fourierdlem33 43571 fourierdlem48 43585 fourierdlem49 43586 fouriersw 43662 iscnrm3lem1 46115 iscnrm3rlem7 46128 |
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