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Related theorems GIF version |
| Description: The closure of a subset of a topological space is included in the space. |
| 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 7692 | . 2 ⊢ ((J ∈ Top ⋀ S ⊆ X) → ((cls ‘J) ‘S) ∈ (Clsd ‘J)) |
| 3 | 1 | cldss 7680 | . 2 ⊢ ((J ∈ Top ⋀ ((cls ‘J) ‘S) ∈ (Clsd ‘J)) → ((cls ‘J) ‘S) ⊆ X) |
| 4 | 2, 3 | syldan 470 | 1 ⊢ ((J ∈ Top ⋀ S ⊆ X) → ((cls ‘J) ‘S) ⊆ X) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ⋀ wa 223 = wceq 960 ∈ wcel 962 ⊆ wss 2056 ∪cuni 2515 ‘cfv 3196 Topctop 7603 Clsdccld 7669 clsccl 7671 |
| This theorem is referenced by: cmntrcld 7703 clsidm 7707 elcls2 7714 clsndisj 7715 ntrcls0 7716 neindisj 7740 lpss 7755 clslp 7757 qdensere 7760 bcthlem7 8014 bcthlem10 8017 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 966 ax-gen 967 ax-8 968 ax-9 969 ax-10 970 ax-11 971 ax-12 972 ax-13 973 ax-14 974 ax-17 975 ax-4 977 ax-5o 979 ax-6o 982 ax-9o 1129 ax-10o 1146 ax-16 1216 ax-11o 1224 ax-ext 1466 ax-rep 2706 ax-sep 2716 ax-pow 2756 ax-pr 2793 ax-un 2880 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 781 df-ex 985 df-sb 1178 df-eu 1388 df-mo 1389 df-clab 1471 df-cleq 1476 df-clel 1479 df-ne 1594 df-ral 1656 df-rex 1657 df-rab 1659 df-v 1819 df-sbc 1949 df-csb 2010 df-dif 2058 df-un 2059 df-in 2060 df-ss 2062 df-nul 2290 df-pw 2412 df-sn 2422 df-pr 2423 df-op 2426 df-uni 2516 df-int 2546 df-iun 2580 df-iin 2581 df-br 2633 df-opab 2680 df-id 2849 df-xp 3198 df-rel 3199 df-cnv 3200 df-co 3201 df-dm 3202 df-rn 3203 df-res 3204 df-ima 3205 df-fun 3206 df-fn 3207 df-fv 3212 df-top 7607 df-cld 7672 df-cls 7674 |