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Theorem hmphsym 23039
Description: "Is homeomorphic to" is symmetric. (Contributed by FL, 8-Mar-2007.) (Proof shortened by Mario Carneiro, 30-May-2014.)
Assertion
Ref Expression
hmphsym (𝐽𝐾𝐾𝐽)

Proof of Theorem hmphsym
Dummy variable 𝑓 is distinct from all other variables.
StepHypRef Expression
1 hmph 23033 . . 3 (𝐽𝐾 ↔ (𝐽Homeo𝐾) ≠ ∅)
2 n0 4298 . . 3 ((𝐽Homeo𝐾) ≠ ∅ ↔ ∃𝑓 𝑓 ∈ (𝐽Homeo𝐾))
31, 2bitri 275 . 2 (𝐽𝐾 ↔ ∃𝑓 𝑓 ∈ (𝐽Homeo𝐾))
4 hmeocnv 23019 . . . 4 (𝑓 ∈ (𝐽Homeo𝐾) → 𝑓 ∈ (𝐾Homeo𝐽))
5 hmphi 23034 . . . 4 (𝑓 ∈ (𝐾Homeo𝐽) → 𝐾𝐽)
64, 5syl 17 . . 3 (𝑓 ∈ (𝐽Homeo𝐾) → 𝐾𝐽)
76exlimiv 1933 . 2 (∃𝑓 𝑓 ∈ (𝐽Homeo𝐾) → 𝐾𝐽)
83, 7sylbi 216 1 (𝐽𝐾𝐾𝐽)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wex 1781  wcel 2106  wne 2941  c0 4274   class class class wbr 5097  ccnv 5624  (class class class)co 7342  Homeochmeo 23010  chmph 23011
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 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2708  ax-sep 5248  ax-nul 5255  ax-pow 5313  ax-pr 5377  ax-un 7655
This theorem depends on definitions:  df-bi 206  df-an 398  df-or 846  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2539  df-eu 2568  df-clab 2715  df-cleq 2729  df-clel 2815  df-nfc 2887  df-ne 2942  df-ral 3063  df-rex 3072  df-rab 3405  df-v 3444  df-sbc 3732  df-csb 3848  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4275  df-if 4479  df-pw 4554  df-sn 4579  df-pr 4581  df-op 4585  df-uni 4858  df-iun 4948  df-br 5098  df-opab 5160  df-mpt 5181  df-id 5523  df-xp 5631  df-rel 5632  df-cnv 5633  df-co 5634  df-dm 5635  df-rn 5636  df-res 5637  df-ima 5638  df-suc 6313  df-iota 6436  df-fun 6486  df-fn 6487  df-f 6488  df-fv 6492  df-ov 7345  df-oprab 7346  df-mpo 7347  df-1st 7904  df-2nd 7905  df-1o 8372  df-map 8693  df-top 22149  df-topon 22166  df-cn 22484  df-hmeo 23012  df-hmph 23013
This theorem is referenced by:  hmpher  23041  hmphsymb  23043  haushmphlem  23044  t0kq  23075  kqhmph  23076  ist1-5lem  23077  reheibor  36151
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