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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 23216 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘(𝐽 ↾t 𝐴)) = ((topGen‘𝐽) ↾t 𝐴)) | |
| 2 | tgtop 23030 | . . . . 5 ⊢ (𝐽 ∈ Top → (topGen‘𝐽) = 𝐽) | |
| 3 | 2 | adantr 484 | . . . 4 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘𝐽) = 𝐽) |
| 4 | 3 | oveq1d 7411 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → ((topGen‘𝐽) ↾t 𝐴) = (𝐽 ↾t 𝐴)) |
| 5 | 1, 4 | eqtrd 2797 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (topGen‘(𝐽 ↾t 𝐴)) = (𝐽 ↾t 𝐴)) |
| 6 | topbas 23029 | . . . 4 ⊢ (𝐽 ∈ Top → 𝐽 ∈ TopBases) | |
| 7 | 6 | adantr 484 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → 𝐽 ∈ TopBases) |
| 8 | restbas 23215 | . . 3 ⊢ (𝐽 ∈ TopBases → (𝐽 ↾t 𝐴) ∈ TopBases) | |
| 9 | tgcl 23026 | . . 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 2863 | 1 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ 𝑉) → (𝐽 ↾t 𝐴) ∈ Top) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 = wceq 1560 ∈ wcel 2142 ‘cfv 6521 (class class class)co 7396 ↾t crest 17449 topGenctg 17466 Topctop 22950 TopBasesctb 23002 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5227 ax-sep 5246 ax-nul 5256 ax-pow 5322 ax-pr 5390 ax-un 7718 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1099 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3077 df-rex 3087 df-reu 3368 df-rab 3415 df-v 3456 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-int 4906 df-iun 4951 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-ord 6349 df-on 6350 df-lim 6351 df-suc 6352 df-iota 6477 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-fv 6529 df-ov 7399 df-oprab 7400 df-mpo 7401 df-om 7847 df-1st 7970 df-2nd 7971 df-en 8928 df-fin 8931 df-fi 9357 df-rest 17451 df-topgen 17472 df-top 22951 df-bases 23003 |
| This theorem is referenced by: resttopon 23218 resttopon2 23225 rest0 23226 restcld 23229 neitr 23237 restcls 23238 restntr 23239 ordtrest 23259 cmpsub 23457 fiuncmp 23461 1stcrest 23510 subislly 23538 llyrest 23542 nllyrest 23543 toplly 23547 cldllycmp 23552 kgencmp2 23603 llycmpkgen2 23607 1stckgen 23611 txkgen 23709 cnextfres1 24125 zdis 24874 cnmpopc 24987 dvbss 25960 dvreslem 25968 dvres2lem 25969 dvcnp2 25979 dvmptres 26022 ulmdvlem3 26462 psercn 26486 abelth 26501 zarmxt1 34174 ordtrestNEW 34215 cvxpconn 35589 cvmscld 35620 ptrest 38115 poimirlem29 38145 cnambfre 38164 limcresiooub 46213 limcresioolb 46214 cncfuni 46457 cncfiooicclem1 46464 fourierdlem32 46710 fourierdlem33 46711 fourierdlem48 46725 fourierdlem49 46726 fouriersw 46802 iscnrm3lem1 49552 iscnrm3rlem7 49564 |
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