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| Mirrors > Home > MPE Home > Th. List > sscls | Structured version Visualization version GIF version | ||
| Description: A subset of a topology's underlying set is included in its closure. (Contributed by NM, 22-Feb-2007.) |
| Ref | Expression |
|---|---|
| clscld.1 | ⊢ 𝑋 = ∪ 𝐽 |
| Ref | Expression |
|---|---|
| sscls | ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋) → 𝑆 ⊆ ((cls‘𝐽)‘𝑆)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssintub 4929 | . 2 ⊢ 𝑆 ⊆ ∩ {𝑥 ∈ (Clsd‘𝐽) ∣ 𝑆 ⊆ 𝑥} | |
| 2 | clscld.1 | . . 3 ⊢ 𝑋 = ∪ 𝐽 | |
| 3 | 2 | clsval 23268 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋) → ((cls‘𝐽)‘𝑆) = ∩ {𝑥 ∈ (Clsd‘𝐽) ∣ 𝑆 ⊆ 𝑥}) |
| 4 | 1, 3 | sseqtrrid 3977 | 1 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋) → 𝑆 ⊆ ((cls‘𝐽)‘𝑆)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 {crab 3414 ⊆ wss 3902 ∪ cuni 4870 ∩ cint 4910 ‘cfv 6537 Topctop 23124 Clsdccld 23247 clsccl 23249 |
| 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 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-int 4911 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 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-top 23125 df-cld 23250 df-cls 23252 |
| This theorem is used by: iscld4 23296 elcls 23304 ntrcls0 23307 clslp 23379 restcls 23412 cncls2i 23501 nrmsep 23588 lpcls 23595 regsep2 23607 hauscmplem 23637 hauscmp 23638 clsconn 23661 conncompcld 23665 hausllycmp 23726 txcls 23836 ptclsg 23847 regr1lem 23971 kqreglem1 23973 kqreglem2 23974 kqnrmlem1 23975 kqnrmlem2 23976 fclscmpi 24261 flfcntr 24275 cnextfres 24301 clssubg 24341 tsmsid 24372 cnllycmp 25190 clsocv 25484 relcmpcmet 25552 bcthlem2 25559 bcthlem4 25561 limcnlp 26112 opnbnd 36952 opnregcld 36957 cldregopn 36958 heibor1lem 38567 heiborlem8 38576 sepdisj 49859 iscnrm3rlem4 49877 |
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