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Mirrors > Home > MPE Home > Th. List > clsss3 | Structured version Visualization version GIF version |
Description: The closure of a subset of a topological space is included in the space. (Contributed by NM, 26-Feb-2007.) |
Ref | Expression |
---|---|
clscld.1 | ⊢ 𝑋 = ∪ 𝐽 |
Ref | Expression |
---|---|
clsss3 | ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋) → ((cls‘𝐽)‘𝑆) ⊆ 𝑋) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | clscld.1 | . . 3 ⊢ 𝑋 = ∪ 𝐽 | |
2 | 1 | clscld 20899 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋) → ((cls‘𝐽)‘𝑆) ∈ (Clsd‘𝐽)) |
3 | 1 | cldss 20881 | . 2 ⊢ (((cls‘𝐽)‘𝑆) ∈ (Clsd‘𝐽) → ((cls‘𝐽)‘𝑆) ⊆ 𝑋) |
4 | 2, 3 | syl 17 | 1 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋) → ((cls‘𝐽)‘𝑆) ⊆ 𝑋) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1523 ∈ wcel 2030 ⊆ wss 3607 ∪ cuni 4468 ‘cfv 5926 Topctop 20746 Clsdccld 20868 clsccl 20870 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1762 ax-4 1777 ax-5 1879 ax-6 1945 ax-7 1981 ax-8 2032 ax-9 2039 ax-10 2059 ax-11 2074 ax-12 2087 ax-13 2282 ax-ext 2631 ax-rep 4804 ax-sep 4814 ax-nul 4822 ax-pow 4873 ax-pr 4936 ax-un 6991 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3an 1056 df-tru 1526 df-ex 1745 df-nf 1750 df-sb 1938 df-eu 2502 df-mo 2503 df-clab 2638 df-cleq 2644 df-clel 2647 df-nfc 2782 df-ne 2824 df-ral 2946 df-rex 2947 df-reu 2948 df-rab 2950 df-v 3233 df-sbc 3469 df-csb 3567 df-dif 3610 df-un 3612 df-in 3614 df-ss 3621 df-nul 3949 df-if 4120 df-pw 4193 df-sn 4211 df-pr 4213 df-op 4217 df-uni 4469 df-int 4508 df-iun 4554 df-iin 4555 df-br 4686 df-opab 4746 df-mpt 4763 df-id 5053 df-xp 5149 df-rel 5150 df-cnv 5151 df-co 5152 df-dm 5153 df-rn 5154 df-res 5155 df-ima 5156 df-iota 5889 df-fun 5928 df-fn 5929 df-f 5930 df-f1 5931 df-fo 5932 df-f1o 5933 df-fv 5934 df-top 20747 df-cld 20871 df-cls 20873 |
This theorem is referenced by: clsidm 20919 elcls2 20926 clsndisj 20927 ntrcls0 20928 neindisj 20969 lpval 20991 lpss 20994 clslp 21000 cnclsi 21124 cncls 21126 isnrm2 21210 lpcls 21216 perfcls 21217 regsep2 21228 clsconn 21281 conncompcld 21285 2ndcsep 21310 1stcelcls 21312 hausllycmp 21345 txcls 21455 ptclsg 21466 imasncls 21543 kqnrmlem1 21594 reghmph 21644 nrmhmph 21645 flimclslem 21835 flimsncls 21837 hauspwpwf1 21838 fclsopn 21865 fclscmpi 21880 cnextfun 21915 clssubg 21959 clsnsg 21960 snclseqg 21966 utop3cls 22102 qdensere 22620 clsocv 23095 relcmpcmet 23161 cncmet 23165 kur14lem3 31316 topbnd 32444 clsun 32448 opnregcld 32450 cldregopn 32451 heibor1lem 33738 qndenserrn 40837 |
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