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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 22964 | . . . 4 ⊢ 𝐵 = ∪ 𝐴 |
| 3 | 2 | restid 17453 | . . 3 ⊢ (𝐴 ∈ (TopOn‘𝐵) → (𝐴 ↾t 𝐵) = 𝐴) |
| 4 | 1, 3 | ax-mp 5 | . 2 ⊢ (𝐴 ↾t 𝐵) = 𝐴 |
| 5 | 4 | eqcomi 2770 | 1 ⊢ 𝐴 = (𝐴 ↾t 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1559 ∈ wcel 2141 ‘cfv 6516 (class class class)co 7391 ↾t crest 17440 TopOnctopon 22958 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5224 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7713 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5179 df-id 5538 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-iota 6472 df-fun 6518 df-fn 6519 df-f 6520 df-f1 6521 df-fo 6522 df-f1o 6523 df-fv 6524 df-ov 7394 df-oprab 7395 df-mpo 7396 df-rest 17442 df-topon 22959 |
| This theorem is referenced by: cncfcn1 24961 cncfmpt2f 24965 cdivcncf 24971 cnrehmeo 25003 mulcncf 25496 cnlimc 25938 dvidlem 25965 dvcnp2 25970 dvcn 25971 dvnres 25981 dvaddbr 25988 dvmulbr 25989 dvcobr 25996 dvcjbr 25999 dvrec 26005 dvexp3 26028 dveflem 26029 dvlipcn 26044 lhop1lem 26063 ftc1cn 26093 dvply1 26336 dvtaylp 26421 taylthlem2 26425 psercn 26477 pserdvlem2 26479 pserdv 26480 abelth 26492 logcn 26700 dvloglem 26701 dvlog 26704 dvlog2 26706 efopnlem2 26710 logtayl 26713 cxpcn 26798 cxpcn2 26799 cxpcn3 26801 resqrtcn 26802 sqrtcn 26803 dvatan 26988 ftalem3 27127 cxpcncf1 34850 knoppcnlem10 36901 knoppcnlem11 36902 dvtan 38130 ftc1cnnc 38152 dvasin 38164 dvacos 38165 cxpcncf2 46434 |
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