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Mirrors > Home > MPE Home > Th. List > hmeocnv | Structured version Visualization version GIF version |
Description: The converse of a homeomorphism is a homeomorphism. (Contributed by FL, 5-Mar-2007.) (Revised by Mario Carneiro, 22-Aug-2015.) |
Ref | Expression |
---|---|
hmeocnv | ⊢ (𝐹 ∈ (𝐽Homeo𝐾) → ◡𝐹 ∈ (𝐾Homeo𝐽)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | hmeocnvcn 22366 | . 2 ⊢ (𝐹 ∈ (𝐽Homeo𝐾) → ◡𝐹 ∈ (𝐾 Cn 𝐽)) | |
2 | hmeocn 22365 | . . . . 5 ⊢ (𝐹 ∈ (𝐽Homeo𝐾) → 𝐹 ∈ (𝐽 Cn 𝐾)) | |
3 | eqid 2798 | . . . . . 6 ⊢ ∪ 𝐽 = ∪ 𝐽 | |
4 | eqid 2798 | . . . . . 6 ⊢ ∪ 𝐾 = ∪ 𝐾 | |
5 | 3, 4 | cnf 21851 | . . . . 5 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐹:∪ 𝐽⟶∪ 𝐾) |
6 | frel 6492 | . . . . 5 ⊢ (𝐹:∪ 𝐽⟶∪ 𝐾 → Rel 𝐹) | |
7 | 2, 5, 6 | 3syl 18 | . . . 4 ⊢ (𝐹 ∈ (𝐽Homeo𝐾) → Rel 𝐹) |
8 | dfrel2 6013 | . . . 4 ⊢ (Rel 𝐹 ↔ ◡◡𝐹 = 𝐹) | |
9 | 7, 8 | sylib 221 | . . 3 ⊢ (𝐹 ∈ (𝐽Homeo𝐾) → ◡◡𝐹 = 𝐹) |
10 | 9, 2 | eqeltrd 2890 | . 2 ⊢ (𝐹 ∈ (𝐽Homeo𝐾) → ◡◡𝐹 ∈ (𝐽 Cn 𝐾)) |
11 | ishmeo 22364 | . 2 ⊢ (◡𝐹 ∈ (𝐾Homeo𝐽) ↔ (◡𝐹 ∈ (𝐾 Cn 𝐽) ∧ ◡◡𝐹 ∈ (𝐽 Cn 𝐾))) | |
12 | 1, 10, 11 | sylanbrc 586 | 1 ⊢ (𝐹 ∈ (𝐽Homeo𝐾) → ◡𝐹 ∈ (𝐾Homeo𝐽)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1538 ∈ wcel 2111 ∪ cuni 4800 ◡ccnv 5518 Rel wrel 5524 ⟶wf 6320 (class class class)co 7135 Cn ccn 21829 Homeochmeo 22358 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-fv 6332 df-ov 7138 df-oprab 7139 df-mpo 7140 df-map 8391 df-top 21499 df-topon 21516 df-cn 21832 df-hmeo 22360 |
This theorem is referenced by: hmeocnvb 22379 hmphsym 22387 xpstopnlem2 22416 |
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