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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 22899 | . . . 4 ⊢ 𝐵 = ∪ 𝐴 |
| 3 | 2 | restid 17387 | . . 3 ⊢ (𝐴 ∈ (TopOn‘𝐵) → (𝐴 ↾t 𝐵) = 𝐴) |
| 4 | 1, 3 | ax-mp 5 | . 2 ⊢ (𝐴 ↾t 𝐵) = 𝐴 |
| 5 | 4 | eqcomi 2748 | 1 ⊢ 𝐴 = (𝐴 ↾t 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1547 ∈ wcel 2119 ‘cfv 6485 (class class class)co 7356 ↾t crest 17374 TopOnctopon 22893 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-rep 5199 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-id 5513 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-ov 7359 df-oprab 7360 df-mpo 7361 df-rest 17376 df-topon 22894 |
| This theorem is referenced by: cncfcn1 24896 cncfmpt2f 24900 cdivcncf 24906 cnrehmeo 24938 mulcncf 25431 cnlimc 25873 dvidlem 25900 dvcnp2 25905 dvcn 25906 dvnres 25916 dvaddbr 25923 dvmulbr 25924 dvcobr 25931 dvcjbr 25934 dvrec 25940 dvexp3 25963 dveflem 25964 dvlipcn 25979 lhop1lem 25998 ftc1cn 26028 dvply1 26268 dvtaylp 26353 taylthlem2 26357 psercn 26409 pserdvlem2 26411 pserdv 26412 abelth 26424 logcn 26629 dvloglem 26630 dvlog 26633 dvlog2 26635 efopnlem2 26639 logtayl 26642 cxpcn 26727 cxpcn2 26728 cxpcn3 26730 resqrtcn 26731 sqrtcn 26732 dvatan 26917 ftalem3 27056 cxpcncf1 34779 knoppcnlem10 36808 knoppcnlem11 36809 dvtan 38037 ftc1cnnc 38059 dvasin 38071 dvacos 38072 cxpcncf2 46342 |
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