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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 23388 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋) → ((cls‘𝐽)‘𝑆) = ∩ {𝑥 ∈ (Clsd‘𝐽) ∣ 𝑆 ⊆ 𝑥}) |
| 4 | 1, 3 | sseqtrrid 3956 | 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 2147 {crab 3416 ⊆ wss 3900 ∪ cuni 4870 ∩ cint 4910 ‘cfv 6561 Topctop 23244 Clsdccld 23367 clsccl 23369 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5236 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-id 5551 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-iota 6515 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-top 23245 df-cld 23370 df-cls 23372 |
| This theorem is used by: iscld4 23416 elcls 23424 ntrcls0 23427 clslp 23499 restcls 23532 cncls2i 23621 nrmsep 23708 lpcls 23715 regsep2 23727 hauscmplem 23757 hauscmp 23758 clsconn 23781 conncompcld 23785 hausllycmp 23846 txcls 23956 ptclsg 23967 regr1lem 24091 kqreglem1 24093 kqreglem2 24094 kqnrmlem1 24095 kqnrmlem2 24096 fclscmpi 24381 flfcntr 24395 cnextfres 24421 clssubg 24461 tsmsid 24492 cnllycmp 25310 clsocv 25604 relcmpcmet 25672 bcthlem2 25679 bcthlem4 25681 limcnlp 26231 opnbnd 37304 opnregcld 37309 cldregopn 37310 heibor1lem 38946 heiborlem8 38955 sepdisj 50254 iscnrm3rlem4 50272 |
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