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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 23470 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘(𝐽 ↾t 𝐴)) = ((topGen‘𝐽) ↾t 𝐴)) | |
| 2 | tgtop 23284 | . . . . 5 ⊢ (𝐽 ∈ Top → (topGen‘𝐽) = 𝐽) | |
| 3 | 2 | adantr 486 | . . . 4 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘𝐽) = 𝐽) |
| 4 | 3 | oveq1d 7433 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → ((topGen‘𝐽) ↾t 𝐴) = (𝐽 ↾t 𝐴)) |
| 5 | 1, 4 | eqtrd 2796 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘(𝐽 ↾t 𝐴)) = (𝐽 ↾t 𝐴)) |
| 6 | topbas 23283 | . . . 4 ⊢ (𝐽 ∈ Top → 𝐽 ∈ TopBases) | |
| 7 | 6 | adantr 486 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → 𝐽 ∈ TopBases) |
| 8 | restbas 23469 | . . 3 ⊢ (𝐽 ∈ TopBases → (𝐽 ↾t 𝐴) ∈ TopBases) | |
| 9 | tgcl 23280 | . . 3 ⊢ ((𝐽 ↾t 𝐴) ∈ TopBases → (topGen‘(𝐽 ↾t 𝐴)) ∈ Top) | |
| 10 | 7, 8, 9 | 3syl 19 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘(𝐽 ↾t 𝐴)) ∈ Top) |
| 11 | 5, 10 | eqeltrrd 2862 | 1 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (𝐽 ↾t 𝐴) ∈ Top) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ‘cfv 6537 (class class class)co 7418 ↾t crest 17584 topGenctg 17601 Topctop 23204 TopBasesctb 23256 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7421 df-oprab 7422 df-mpo 7423 df-om 7876 df-1st 7999 df-2nd 8000 df-en 8967 df-fin 8970 df-fi 9396 df-rest 17586 df-topgen 17607 df-top 23205 df-bases 23257 |
| This theorem is used by: resttopon 23472 resttopon2 23479 rest0 23480 restcld 23483 neitr 23491 restcls 23492 restntr 23493 ordtrest 23513 cmpsub 23711 fiuncmp 23715 1stcrest 23764 subislly 23793 llyrest 23797 nllyrest 23798 toplly 23802 cldllycmp 23807 kgencmp2 23858 llycmpkgen2 23862 1stckgen 23866 txkgen 23964 cnextfres1 24380 zdis 25129 cnmpopc 25242 dvbss 26214 dvreslem 26222 dvres2lem 26223 dvcnp2 26233 dvmptres 26276 ulmdvlem3 26722 psercn 26746 abelth 26761 zarmxt1 34505 ordtrestNEW 34546 cvxpconn 35986 cvmscld 36017 ptrest 38517 poimirlem29 38547 cnambfre 38566 limcresiooub 46621 limcresioolb 46622 cncfuni 46865 cncfiooicclem1 46872 fourierdlem32 47118 fourierdlem33 47119 fourierdlem48 47133 fourierdlem49 47134 fouriersw 47210 iscnrm3lem1 50011 iscnrm3rlem7 50023 |
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