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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 23038 | . . . 4 ⊢ 𝐵 = ∪ 𝐴 |
| 3 | 2 | restid 17482 | . . 3 ⊢ (𝐴 ∈ (TopOn‘𝐵) → (𝐴 ↾t 𝐵) = 𝐴) |
| 4 | 1, 3 | ax-mp 5 | . 2 ⊢ (𝐴 ↾t 𝐵) = 𝐴 |
| 5 | 4 | eqcomi 2778 | 1 ⊢ 𝐴 = (𝐴 ↾t 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1567 ∈ wcel 2149 ‘cfv 6534 (class class class)co 7408 ↾t crest 17469 TopOnctopon 23032 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5239 ax-sep 5258 ax-nul 5268 ax-pow 5334 ax-pr 5402 ax-un 7730 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6490 df-fun 6536 df-fn 6537 df-f 6538 df-f1 6539 df-fo 6540 df-f1o 6541 df-fv 6542 df-ov 7411 df-oprab 7412 df-mpo 7413 df-rest 17471 df-topon 23033 |
| This theorem is referenced by: cncfcn1 25035 cncfmpt2f 25039 cdivcncf 25045 cnrehmeo 25077 mulcncf 25570 cnlimc 26012 dvidlem 26039 dvcnp2 26044 dvcn 26045 dvnres 26055 dvaddbr 26062 dvmulbr 26063 dvcobr 26070 dvcjbr 26073 dvrec 26079 dvexp3 26102 dveflem 26103 dvlipcn 26118 lhop1lem 26137 ftc1cn 26167 dvply1 26410 dvtaylp 26495 taylthlem2 26499 psercn 26551 pserdvlem2 26553 pserdv 26554 abelth 26566 logcn 26774 dvloglem 26775 dvlog 26778 dvlog2 26780 efopnlem2 26784 logtayl 26787 cxpcn 26872 cxpcn2 26873 cxpcn3 26875 resqrtcn 26876 sqrtcn 26877 dvatan 27062 ftalem3 27201 cxpcncf1 34923 knoppcnlem10 36976 knoppcnlem11 36977 dvtan 38204 ftc1cnnc 38226 dvasin 38238 dvacos 38239 cxpcncf2 46500 |
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