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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 4925 | . 2 ⊢ 𝑆 ⊆ ∩ {𝑥 ∈ (Clsd‘𝐽) ∣ 𝑆 ⊆ 𝑥} | |
| 2 | clscld.1 | . . 3 ⊢ 𝑋 = ∪ 𝐽 | |
| 3 | 2 | clsval 23361 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋) → ((cls‘𝐽)‘𝑆) = ∩ {𝑥 ∈ (Clsd‘𝐽) ∣ 𝑆 ⊆ 𝑥}) |
| 4 | 1, 3 | sseqtrrid 3951 | 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 1569 ∈ wcel 2144 {crab 3412 ⊆ wss 3895 ∪ cuni 4866 ∩ cint 4906 ‘cfv 6539 Topctop 23217 Clsdccld 23340 clsccl 23342 |
| 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 5326 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 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 3847 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 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-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-iota 6494 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-top 23218 df-cld 23343 df-cls 23345 |
| This theorem is used by: iscld4 23389 elcls 23397 ntrcls0 23400 clslp 23472 restcls 23505 cncls2i 23594 nrmsep 23681 lpcls 23688 regsep2 23700 hauscmplem 23730 hauscmp 23731 clsconn 23754 conncompcld 23758 hausllycmp 23819 txcls 23929 ptclsg 23940 regr1lem 24064 kqreglem1 24066 kqreglem2 24067 kqnrmlem1 24068 kqnrmlem2 24069 fclscmpi 24354 flfcntr 24368 cnextfres 24394 clssubg 24434 tsmsid 24465 cnllycmp 25283 clsocv 25577 relcmpcmet 25645 bcthlem2 25652 bcthlem4 25654 limcnlp 26204 opnbnd 37206 opnregcld 37211 cldregopn 37212 heibor1lem 38837 heiborlem8 38846 sepdisj 50133 iscnrm3rlem4 50151 |
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