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| Mirrors > Home > ILE Home > Th. List > clsss2 | Unicode version | ||
| Description: If a subset is included in a closed set, so is the subset's closure. (Contributed by NM, 22-Feb-2007.) |
| Ref | Expression |
|---|---|
| clscld.1 |
|
| Ref | Expression |
|---|---|
| clsss2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cldrcl 14937 |
. . . 4
| |
| 2 | 1 | adantr 276 |
. . 3
|
| 3 | clscld.1 |
. . . . 5
| |
| 4 | 3 | cldss 14940 |
. . . 4
|
| 5 | 4 | adantr 276 |
. . 3
|
| 6 | simpr 110 |
. . 3
| |
| 7 | 3 | clsss 14953 |
. . 3
|
| 8 | 2, 5, 6, 7 | syl3anc 1274 |
. 2
|
| 9 | cldcls 14949 |
. . 3
| |
| 10 | 9 | adantr 276 |
. 2
|
| 11 | 8, 10 | sseqtrd 3275 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-coll 4218 ax-sep 4221 ax-pow 4279 ax-pr 4314 ax-un 4545 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-reu 2527 df-rab 2529 df-v 2814 df-sbc 3042 df-csb 3138 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-nul 3506 df-pw 3667 df-sn 3688 df-pr 3689 df-op 3691 df-uni 3908 df-int 3943 df-iun 3986 df-br 4103 df-opab 4165 df-mpt 4166 df-id 4405 df-xp 4746 df-rel 4747 df-cnv 4748 df-co 4749 df-dm 4750 df-rn 4751 df-res 4752 df-ima 4753 df-iota 5303 df-fun 5345 df-fn 5346 df-f 5347 df-f1 5348 df-fo 5349 df-f1o 5350 df-fv 5351 df-top 14833 df-cld 14930 df-cls 14932 |
| This theorem is referenced by: clsss3 14965 |
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