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| Mirrors > Home > MPE Home > Th. List > toponrestid | Structured version Visualization version GIF version | ||
| Description: Given a topology on a set, restricting it to that same set has no effect. (Contributed by Jim Kingdon, 6-Jul-2022.) |
| Ref | Expression |
|---|---|
| toponrestid.t | ⊢ 𝐴 ∈ (TopOn‘𝐵) |
| Ref | Expression |
|---|---|
| toponrestid | ⊢ 𝐴 = (𝐴 ↾t 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | toponrestid.t | . . 3 ⊢ 𝐴 ∈ (TopOn‘𝐵) | |
| 2 | 1 | toponunii 23073 | . . . 4 ⊢ 𝐵 = ∪ 𝐴 |
| 3 | 2 | restid 17481 | . . 3 ⊢ (𝐴 ∈ (TopOn‘𝐵) → (𝐴 ↾t 𝐵) = 𝐴) |
| 4 | 1, 3 | ax-mp 5 | . 2 ⊢ (𝐴 ↾t 𝐵) = 𝐴 |
| 5 | 4 | eqcomi 2772 | 1 ⊢ 𝐴 = (𝐴 ↾t 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1570 ∈ wcel 2143 ‘cfv 6536 (class class class)co 7410 ↾t crest 17468 TopOnctopon 23067 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7413 df-oprab 7414 df-mpo 7415 df-rest 17470 df-topon 23068 |
| This theorem is referenced by: cncfcn1 25070 cncfmpt2f 25074 cdivcncf 25080 cnrehmeo 25112 mulcncf 25605 cnlimc 26047 dvidlem 26074 dvcnp2 26079 dvcn 26080 dvnres 26090 dvaddbr 26097 dvmulbr 26098 dvcobr 26105 dvcjbr 26108 dvrec 26114 dvexp3 26137 dveflem 26138 dvlipcn 26153 lhop1lem 26172 ftc1cn 26202 dvply1 26445 dvtaylp 26533 taylthlem2 26537 psercn 26589 pserdvlem2 26591 pserdv 26592 abelth 26604 logcn 26812 dvloglem 26813 dvlog 26816 dvlog2 26818 efopnlem2 26822 logtayl 26825 cxpcn 26910 cxpcn2 26911 cxpcn3 26913 resqrtcn 26914 sqrtcn 26915 dvatan 27100 ftalem3 27239 cxpcncf1 34982 knoppcnlem10 37091 knoppcnlem11 37092 dvtan 38321 ftc1cnnc 38343 dvasin 38355 dvacos 38356 cxpcncf2 46613 |
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