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Theorem hmeoimaf1o 21793
 Description: The function mapping open sets to their images under a homeomorphism is a bijection of topologies. (Contributed by Mario Carneiro, 10-Sep-2015.)
Hypothesis
Ref Expression
hmeoimaf1o.1 𝐺 = (𝑥𝐽 ↦ (𝐹𝑥))
Assertion
Ref Expression
hmeoimaf1o (𝐹 ∈ (𝐽Homeo𝐾) → 𝐺:𝐽1-1-onto𝐾)
Distinct variable groups:   𝑥,𝐹   𝑥,𝐽   𝑥,𝐾
Allowed substitution hint:   𝐺(𝑥)

Proof of Theorem hmeoimaf1o
Dummy variable 𝑦 is distinct from all other variables.
StepHypRef Expression
1 hmeoimaf1o.1 . 2 𝐺 = (𝑥𝐽 ↦ (𝐹𝑥))
2 hmeoima 21788 . 2 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ 𝑥𝐽) → (𝐹𝑥) ∈ 𝐾)
3 hmeocn 21783 . . 3 (𝐹 ∈ (𝐽Homeo𝐾) → 𝐹 ∈ (𝐽 Cn 𝐾))
4 cnima 21289 . . 3 ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝑦𝐾) → (𝐹𝑦) ∈ 𝐽)
53, 4sylan 561 . 2 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ 𝑦𝐾) → (𝐹𝑦) ∈ 𝐽)
6 eqid 2770 . . . . . . 7 𝐽 = 𝐽
7 eqid 2770 . . . . . . 7 𝐾 = 𝐾
86, 7hmeof1o 21787 . . . . . 6 (𝐹 ∈ (𝐽Homeo𝐾) → 𝐹: 𝐽1-1-onto 𝐾)
98adantr 466 . . . . 5 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ (𝑥𝐽𝑦𝐾)) → 𝐹: 𝐽1-1-onto 𝐾)
10 f1of1 6277 . . . . 5 (𝐹: 𝐽1-1-onto 𝐾𝐹: 𝐽1-1 𝐾)
119, 10syl 17 . . . 4 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ (𝑥𝐽𝑦𝐾)) → 𝐹: 𝐽1-1 𝐾)
12 elssuni 4601 . . . . 5 (𝑥𝐽𝑥 𝐽)
1312ad2antrl 699 . . . 4 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ (𝑥𝐽𝑦𝐾)) → 𝑥 𝐽)
14 cnvimass 5626 . . . . 5 (𝐹𝑦) ⊆ dom 𝐹
15 f1dm 6245 . . . . . 6 (𝐹: 𝐽1-1 𝐾 → dom 𝐹 = 𝐽)
1611, 15syl 17 . . . . 5 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ (𝑥𝐽𝑦𝐾)) → dom 𝐹 = 𝐽)
1714, 16syl5sseq 3800 . . . 4 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ (𝑥𝐽𝑦𝐾)) → (𝐹𝑦) ⊆ 𝐽)
18 f1imaeq 6664 . . . 4 ((𝐹: 𝐽1-1 𝐾 ∧ (𝑥 𝐽 ∧ (𝐹𝑦) ⊆ 𝐽)) → ((𝐹𝑥) = (𝐹 “ (𝐹𝑦)) ↔ 𝑥 = (𝐹𝑦)))
1911, 13, 17, 18syl12anc 1473 . . 3 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ (𝑥𝐽𝑦𝐾)) → ((𝐹𝑥) = (𝐹 “ (𝐹𝑦)) ↔ 𝑥 = (𝐹𝑦)))
20 f1ofo 6285 . . . . . . 7 (𝐹: 𝐽1-1-onto 𝐾𝐹: 𝐽onto 𝐾)
219, 20syl 17 . . . . . 6 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ (𝑥𝐽𝑦𝐾)) → 𝐹: 𝐽onto 𝐾)
22 elssuni 4601 . . . . . . 7 (𝑦𝐾𝑦 𝐾)
2322ad2antll 700 . . . . . 6 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ (𝑥𝐽𝑦𝐾)) → 𝑦 𝐾)
24 foimacnv 6295 . . . . . 6 ((𝐹: 𝐽onto 𝐾𝑦 𝐾) → (𝐹 “ (𝐹𝑦)) = 𝑦)
2521, 23, 24syl2anc 565 . . . . 5 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ (𝑥𝐽𝑦𝐾)) → (𝐹 “ (𝐹𝑦)) = 𝑦)
2625eqeq2d 2780 . . . 4 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ (𝑥𝐽𝑦𝐾)) → ((𝐹𝑥) = (𝐹 “ (𝐹𝑦)) ↔ (𝐹𝑥) = 𝑦))
27 eqcom 2777 . . . 4 ((𝐹𝑥) = 𝑦𝑦 = (𝐹𝑥))
2826, 27syl6bb 276 . . 3 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ (𝑥𝐽𝑦𝐾)) → ((𝐹𝑥) = (𝐹 “ (𝐹𝑦)) ↔ 𝑦 = (𝐹𝑥)))
2919, 28bitr3d 270 . 2 ((𝐹 ∈ (𝐽Homeo𝐾) ∧ (𝑥𝐽𝑦𝐾)) → (𝑥 = (𝐹𝑦) ↔ 𝑦 = (𝐹𝑥)))
301, 2, 5, 29f1o2d 7033 1 (𝐹 ∈ (𝐽Homeo𝐾) → 𝐺:𝐽1-1-onto𝐾)
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 382   = wceq 1630   ∈ wcel 2144   ⊆ wss 3721  ∪ cuni 4572   ↦ cmpt 4861  ◡ccnv 5248  dom cdm 5249   “ cima 5252  –1-1→wf1 6028  –onto→wfo 6029  –1-1-onto→wf1o 6030  (class class class)co 6792   Cn ccn 21248  Homeochmeo 21776 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1869  ax-4 1884  ax-5 1990  ax-6 2056  ax-7 2092  ax-8 2146  ax-9 2153  ax-10 2173  ax-11 2189  ax-12 2202  ax-13 2407  ax-ext 2750  ax-sep 4912  ax-nul 4920  ax-pow 4971  ax-pr 5034  ax-un 7095 This theorem depends on definitions:  df-bi 197  df-an 383  df-or 827  df-3an 1072  df-tru 1633  df-ex 1852  df-nf 1857  df-sb 2049  df-eu 2621  df-mo 2622  df-clab 2757  df-cleq 2763  df-clel 2766  df-nfc 2901  df-ne 2943  df-ral 3065  df-rex 3066  df-rab 3069  df-v 3351  df-sbc 3586  df-dif 3724  df-un 3726  df-in 3728  df-ss 3735  df-nul 4062  df-if 4224  df-pw 4297  df-sn 4315  df-pr 4317  df-op 4321  df-uni 4573  df-br 4785  df-opab 4845  df-mpt 4862  df-id 5157  df-xp 5255  df-rel 5256  df-cnv 5257  df-co 5258  df-dm 5259  df-rn 5260  df-res 5261  df-ima 5262  df-iota 5994  df-fun 6033  df-fn 6034  df-f 6035  df-f1 6036  df-fo 6037  df-f1o 6038  df-fv 6039  df-ov 6795  df-oprab 6796  df-mpt2 6797  df-map 8010  df-top 20918  df-topon 20935  df-cn 21251  df-hmeo 21778 This theorem is referenced by:  hmphen  21808
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