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| Description: The closure of a subset of a topological space is the subset together with its limit points. Theorem 6.6 of [Munkres] p. 97. |
| Ref | Expression |
|---|---|
| lpfval.1 |
|
| Ref | Expression |
|---|---|
| clslp |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lpfval.1 |
. . . . . . . . . . . . 13
| |
| 2 | 1 | neindisj 9007 |
. . . . . . . . . . . 12
|
| 3 | 2 | expr 418 |
. . . . . . . . . . 11
|
| 4 | 3 | adantr 425 |
. . . . . . . . . 10
|
| 5 | difsn 3125 |
. . . . . . . . . . . . 13
| |
| 6 | 5 | ineq2d 2796 |
. . . . . . . . . . . 12
|
| 7 | 6 | neeq1d 2028 |
. . . . . . . . . . 11
|
| 8 | 7 | adantl 424 |
. . . . . . . . . 10
|
| 9 | 4, 8 | sylibrd 221 |
. . . . . . . . 9
|
| 10 | 9 | ex 402 |
. . . . . . . 8
|
| 11 | 10 | r19.21adv 2181 |
. . . . . . 7
|
| 12 | simpll 448 |
. . . . . . . 8
| |
| 13 | simplr 449 |
. . . . . . . 8
| |
| 14 | 1 | clsss3 8967 |
. . . . . . . . . 10
|
| 15 | 14 | sseld 2619 |
. . . . . . . . 9
|
| 16 | 15 | imp 377 |
. . . . . . . 8
|
| 17 | 1 | islp2 9023 |
. . . . . . . 8
|
| 18 | 12, 13, 16, 17 | syl111anc 1100 |
. . . . . . 7
|
| 19 | 11, 18 | sylibrd 221 |
. . . . . 6
|
| 20 | 19 | orrd 250 |
. . . . 5
|
| 21 | elun 2741 |
. . . . 5
| |
| 22 | 20, 21 | sylibr 217 |
. . . 4
|
| 23 | 22 | ex 402 |
. . 3
|
| 24 | 23 | ssrdv 2622 |
. 2
|
| 25 | 1 | sscls 8965 |
. . . 4
|
| 26 | 1 | lpsscls 9021 |
. . . 4
|
| 27 | 25, 26 | jca 310 |
. . 3
|
| 28 | unss 2780 |
. . 3
| |
| 29 | 27, 28 | sylib 215 |
. 2
|
| 30 | 24, 29 | eqssd 2633 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: islpi 9025 cldlp 9026 metelcls 9243 heiborlem15 15969 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-13 1311 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-rep 3428 ax-sep 3438 ax-nul 3445 ax-pow 3481 ax-pr 3524 ax-un 3790 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-3an 860 df-ex 1327 df-sb 1536 df-eu 1775 df-mo 1776 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-ral 2109 df-rex 2110 df-rab 2112 df-v 2294 df-sbc 2454 df-csb 2541 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-sn 3049 df-pr 3050 df-op 3053 df-uni 3178 df-int 3215 df-iun 3257 df-iin 3258 df-br 3339 df-opab 3396 df-id 3586 df-xp 4000 df-rel 4001 df-cnv 4002 df-co 4003 df-dm 4004 df-rn 4005 df-res 4006 df-ima 4007 df-fun 4008 df-fn 4009 df-fv 4014 df-top 8861 df-cld 8939 df-ntr 8940 df-cls 8941 df-nei 8989 df-lp 9017 |