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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 22841 | . . . 4 ⊢ 𝐵 = ∪ 𝐴 |
| 3 | 2 | restid 17347 | . . 3 ⊢ (𝐴 ∈ (TopOn‘𝐵) → (𝐴 ↾t 𝐵) = 𝐴) |
| 4 | 1, 3 | ax-mp 5 | . 2 ⊢ (𝐴 ↾t 𝐵) = 𝐴 |
| 5 | 4 | eqcomi 2742 | 1 ⊢ 𝐴 = (𝐴 ↾t 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 ∈ wcel 2113 ‘cfv 6489 (class class class)co 7355 ↾t crest 17334 TopOnctopon 22835 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7677 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4285 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-iun 4945 df-br 5096 df-opab 5158 df-mpt 5177 df-id 5516 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-ov 7358 df-oprab 7359 df-mpo 7360 df-rest 17336 df-topon 22836 |
| This theorem is referenced by: cncfcn1 24841 cncfmpt2f 24845 cdivcncf 24851 cnrehmeo 24888 cnrehmeoOLD 24889 mulcncf 25383 cnlimc 25826 dvidlem 25853 dvcnp2 25858 dvcnp2OLD 25859 dvcn 25860 dvnres 25870 dvaddbr 25877 dvmulbr 25878 dvmulbrOLD 25879 dvcobr 25886 dvcobrOLD 25887 dvcjbr 25890 dvrec 25896 dvexp3 25919 dveflem 25920 dvlipcn 25936 lhop1lem 25955 ftc1cn 25987 dvply1 26228 dvtaylp 26315 taylthlem2 26319 taylthlem2OLD 26320 psercn 26373 pserdvlem2 26375 pserdv 26376 abelth 26388 logcn 26593 dvloglem 26594 dvlog 26597 dvlog2 26599 efopnlem2 26603 logtayl 26606 cxpcn 26691 cxpcnOLD 26692 cxpcn2 26693 cxpcn3 26695 resqrtcn 26696 sqrtcn 26697 dvatan 26882 ftalem3 27022 cxpcncf1 34619 knoppcnlem10 36557 knoppcnlem11 36558 dvtan 37720 ftc1cnnc 37742 dvasin 37754 dvacos 37755 cxpcncf2 46011 |
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