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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 21658 | . 2 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ 𝑋) → ((cls‘𝐽)‘𝑆) ∈ (Clsd‘𝐽)) |
3 | 1 | cldss 21640 | . 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 398 = wceq 1536 ∈ wcel 2113 ⊆ wss 3939 ∪ cuni 4841 ‘cfv 6358 Topctop 21504 Clsdccld 21627 clsccl 21629 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2796 ax-rep 5193 ax-sep 5206 ax-nul 5213 ax-pow 5269 ax-pr 5333 ax-un 7464 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2803 df-cleq 2817 df-clel 2896 df-nfc 2966 df-ne 3020 df-ral 3146 df-rex 3147 df-reu 3148 df-rab 3150 df-v 3499 df-sbc 3776 df-csb 3887 df-dif 3942 df-un 3944 df-in 3946 df-ss 3955 df-nul 4295 df-if 4471 df-pw 4544 df-sn 4571 df-pr 4573 df-op 4577 df-uni 4842 df-int 4880 df-iun 4924 df-iin 4925 df-br 5070 df-opab 5132 df-mpt 5150 df-id 5463 df-xp 5564 df-rel 5565 df-cnv 5566 df-co 5567 df-dm 5568 df-rn 5569 df-res 5570 df-ima 5571 df-iota 6317 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-top 21505 df-cld 21630 df-cls 21632 |
This theorem is referenced by: clsidm 21678 elcls2 21685 clsndisj 21686 ntrcls0 21687 neindisj 21728 lpval 21750 lpss 21753 clslp 21759 cnclsi 21883 cncls 21885 isnrm2 21969 lpcls 21975 perfcls 21976 regsep2 21987 clsconn 22041 conncompcld 22045 2ndcsep 22070 1stcelcls 22072 hausllycmp 22105 txcls 22215 ptclsg 22226 imasncls 22303 kqnrmlem1 22354 reghmph 22404 nrmhmph 22405 flimclslem 22595 flimsncls 22597 hauspwpwf1 22598 fclsopn 22625 fclscmpi 22640 cnextfun 22675 clssubg 22720 clsnsg 22721 snclseqg 22727 utop3cls 22863 qdensere 23381 clsocv 23856 relcmpcmet 23924 cncmet 23928 kur14lem3 32459 topbnd 33676 clsun 33680 opnregcld 33682 cldregopn 33683 heibor1lem 35091 qndenserrn 42591 |
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