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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 22881 | . . . 4 ⊢ 𝐵 = ∪ 𝐴 |
| 3 | 2 | restid 17396 | . . 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 1542 ∈ wcel 2114 ‘cfv 6498 (class class class)co 7367 ↾t crest 17383 TopOnctopon 22875 |
| 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 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-ov 7370 df-oprab 7371 df-mpo 7372 df-rest 17385 df-topon 22876 |
| This theorem is referenced by: cncfcn1 24878 cncfmpt2f 24882 cdivcncf 24888 cnrehmeo 24920 mulcncf 25413 cnlimc 25855 dvidlem 25882 dvcnp2 25887 dvcn 25888 dvnres 25898 dvaddbr 25905 dvmulbr 25906 dvcobr 25913 dvcjbr 25916 dvrec 25922 dvexp3 25945 dveflem 25946 dvlipcn 25961 lhop1lem 25980 ftc1cn 26010 dvply1 26250 dvtaylp 26335 taylthlem2 26339 psercn 26391 pserdvlem2 26393 pserdv 26394 abelth 26406 logcn 26611 dvloglem 26612 dvlog 26615 dvlog2 26617 efopnlem2 26621 logtayl 26624 cxpcn 26709 cxpcn2 26710 cxpcn3 26712 resqrtcn 26713 sqrtcn 26714 dvatan 26899 ftalem3 27038 cxpcncf1 34739 knoppcnlem10 36762 knoppcnlem11 36763 dvtan 37991 ftc1cnnc 38013 dvasin 38025 dvacos 38026 cxpcncf2 46327 |
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