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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 23486 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘(𝐽 ↾t 𝐴)) = ((topGen‘𝐽) ↾t 𝐴)) | |
| 2 | tgtop 23300 | . . . . 5 ⊢ (𝐽 ∈ Top → (topGen‘𝐽) = 𝐽) | |
| 3 | 2 | adantr 486 | . . . 4 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘𝐽) = 𝐽) |
| 4 | 3 | oveq1d 7439 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → ((topGen‘𝐽) ↾t 𝐴) = (𝐽 ↾t 𝐴)) |
| 5 | 1, 4 | eqtrd 2795 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘(𝐽 ↾t 𝐴)) = (𝐽 ↾t 𝐴)) |
| 6 | topbas 23299 | . . . 4 ⊢ (𝐽 ∈ Top → 𝐽 ∈ TopBases) | |
| 7 | 6 | adantr 486 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → 𝐽 ∈ TopBases) |
| 8 | restbas 23485 | . . 3 ⊢ (𝐽 ∈ TopBases → (𝐽 ↾t 𝐴) ∈ TopBases) | |
| 9 | tgcl 23296 | . . 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 2861 | 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 1569 ∈ wcel 2144 ‘cfv 6543 (class class class)co 7424 ↾t crest 17600 topGenctg 17617 Topctop 23220 TopBasesctb 23272 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 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 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-ov 7427 df-oprab 7428 df-mpo 7429 df-om 7882 df-1st 8005 df-2nd 8006 df-en 8981 df-fin 8984 df-fi 9410 df-rest 17602 df-topgen 17623 df-top 23221 df-bases 23273 |
| This theorem is used by: resttopon 23488 resttopon2 23495 rest0 23496 restcld 23499 neitr 23507 restcls 23508 restntr 23509 ordtrest 23529 cmpsub 23727 fiuncmp 23731 1stcrest 23780 subislly 23809 llyrest 23813 nllyrest 23814 toplly 23818 cldllycmp 23823 kgencmp2 23874 llycmpkgen2 23878 1stckgen 23882 txkgen 23980 cnextfres1 24396 zdis 25145 cnmpopc 25258 dvbss 26230 dvreslem 26238 dvres2lem 26239 dvcnp2 26249 dvmptres 26292 ulmdvlem3 26738 psercn 26762 abelth 26777 zarmxt1 34562 ordtrestNEW 34603 cvxpconn 36097 cvmscld 36128 ptrest 38646 poimirlem29 38676 cnambfre 38695 limcresiooub 46760 limcresioolb 46761 cncfuni 47004 cncfiooicclem1 47011 fourierdlem32 47257 fourierdlem33 47258 fourierdlem48 47272 fourierdlem49 47273 fouriersw 47349 iscnrm3lem1 50156 iscnrm3rlem7 50168 |
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