| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 23142 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘(𝐽 ↾t 𝐴)) = ((topGen‘𝐽) ↾t 𝐴)) | |
| 2 | tgtop 22956 | . . . . 5 ⊢ (𝐽 ∈ Top → (topGen‘𝐽) = 𝐽) | |
| 3 | 2 | adantr 481 | . . . 4 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘𝐽) = 𝐽) |
| 4 | 3 | oveq1d 7371 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → ((topGen‘𝐽) ↾t 𝐴) = (𝐽 ↾t 𝐴)) |
| 5 | 1, 4 | eqtrd 2774 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘(𝐽 ↾t 𝐴)) = (𝐽 ↾t 𝐴)) |
| 6 | topbas 22955 | . . . 4 ⊢ (𝐽 ∈ Top → 𝐽 ∈ TopBases) | |
| 7 | 6 | adantr 481 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → 𝐽 ∈ TopBases) |
| 8 | restbas 23141 | . . 3 ⊢ (𝐽 ∈ TopBases → (𝐽 ↾t 𝐴) ∈ TopBases) | |
| 9 | tgcl 22952 | . . 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 396 = wceq 1547 ∈ wcel 2119 ‘cfv 6485 (class class class)co 7356 ↾t crest 17374 topGenctg 17391 Topctop 22876 TopBasesctb 22928 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-rep 5199 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-int 4878 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-tr 5180 df-id 5513 df-eprel 5518 df-po 5526 df-so 5527 df-fr 5571 df-we 5573 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-ord 6313 df-on 6314 df-lim 6315 df-suc 6316 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-1st 7931 df-2nd 7932 df-en 8884 df-fin 8887 df-fi 9314 df-rest 17376 df-topgen 17397 df-top 22877 df-bases 22929 |
| This theorem is referenced by: resttopon 23144 resttopon2 23151 rest0 23152 restcld 23155 neitr 23163 restcls 23164 restntr 23165 ordtrest 23185 cmpsub 23383 fiuncmp 23387 1stcrest 23436 subislly 23464 llyrest 23468 nllyrest 23469 toplly 23473 cldllycmp 23478 kgencmp2 23529 llycmpkgen2 23533 1stckgen 23537 txkgen 23635 cnextfres1 24051 zdis 24800 cnmpopc 24913 dvbss 25886 dvreslem 25894 dvres2lem 25895 dvcnp2 25905 dvmptres 25948 ulmdvlem3 26385 psercn 26409 abelth 26424 zarmxt1 34064 ordtrestNEW 34105 cvxpconn 35470 cvmscld 35501 ptrest 37986 poimirlem29 38016 cnambfre 38035 limcresiooub 46085 limcresioolb 46086 cncfuni 46329 cncfiooicclem1 46336 fourierdlem32 46582 fourierdlem33 46583 fourierdlem48 46597 fourierdlem49 46598 fouriersw 46674 iscnrm3lem1 49424 iscnrm3rlem7 49436 |
| Copyright terms: Public domain | W3C validator |