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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 22860 | . . . 4 ⊢ 𝐵 = ∪ 𝐴 |
| 3 | 2 | restid 17353 | . . 3 ⊢ (𝐴 ∈ (TopOn‘𝐵) → (𝐴 ↾t 𝐵) = 𝐴) |
| 4 | 1, 3 | ax-mp 5 | . 2 ⊢ (𝐴 ↾t 𝐵) = 𝐴 |
| 5 | 4 | eqcomi 2745 | 1 ⊢ 𝐴 = (𝐴 ↾t 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 ∈ wcel 2113 ‘cfv 6492 (class class class)co 7358 ↾t crest 17340 TopOnctopon 22854 |
| 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 2184 ax-ext 2708 ax-rep 5224 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-ov 7361 df-oprab 7362 df-mpo 7363 df-rest 17342 df-topon 22855 |
| This theorem is referenced by: cncfcn1 24860 cncfmpt2f 24864 cdivcncf 24870 cnrehmeo 24907 cnrehmeoOLD 24908 mulcncf 25402 cnlimc 25845 dvidlem 25872 dvcnp2 25877 dvcnp2OLD 25878 dvcn 25879 dvnres 25889 dvaddbr 25896 dvmulbr 25897 dvmulbrOLD 25898 dvcobr 25905 dvcobrOLD 25906 dvcjbr 25909 dvrec 25915 dvexp3 25938 dveflem 25939 dvlipcn 25955 lhop1lem 25974 ftc1cn 26006 dvply1 26247 dvtaylp 26334 taylthlem2 26338 taylthlem2OLD 26339 psercn 26392 pserdvlem2 26394 pserdv 26395 abelth 26407 logcn 26612 dvloglem 26613 dvlog 26616 dvlog2 26618 efopnlem2 26622 logtayl 26625 cxpcn 26710 cxpcnOLD 26711 cxpcn2 26712 cxpcn3 26714 resqrtcn 26715 sqrtcn 26716 dvatan 26901 ftalem3 27041 cxpcncf1 34752 knoppcnlem10 36702 knoppcnlem11 36703 dvtan 37871 ftc1cnnc 37893 dvasin 37905 dvacos 37906 cxpcncf2 46143 |
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