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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 22891 | . . . 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 2746 | 1 ⊢ 𝐴 = (𝐴 ↾t 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 ∈ wcel 2114 ‘cfv 6492 (class class class)co 7360 ↾t crest 17374 TopOnctopon 22885 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 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 7363 df-oprab 7364 df-mpo 7365 df-rest 17376 df-topon 22886 |
| This theorem is referenced by: cncfcn1 24888 cncfmpt2f 24892 cdivcncf 24898 cnrehmeo 24930 mulcncf 25423 cnlimc 25865 dvidlem 25892 dvcnp2 25897 dvcn 25898 dvnres 25908 dvaddbr 25915 dvmulbr 25916 dvcobr 25923 dvcjbr 25926 dvrec 25932 dvexp3 25955 dveflem 25956 dvlipcn 25971 lhop1lem 25990 ftc1cn 26020 dvply1 26260 dvtaylp 26347 taylthlem2 26351 taylthlem2OLD 26352 psercn 26404 pserdvlem2 26406 pserdv 26407 abelth 26419 logcn 26624 dvloglem 26625 dvlog 26628 dvlog2 26630 efopnlem2 26634 logtayl 26637 cxpcn 26722 cxpcn2 26723 cxpcn3 26725 resqrtcn 26726 sqrtcn 26727 dvatan 26912 ftalem3 27052 cxpcncf1 34755 knoppcnlem10 36778 knoppcnlem11 36779 dvtan 38005 ftc1cnnc 38027 dvasin 38039 dvacos 38040 cxpcncf2 46345 |
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