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Theorem t1hmph 23694
Description: T1 is a topological property. (Contributed by Mario Carneiro, 25-Aug-2015.)
Assertion
Ref Expression
t1hmph (𝐽𝐾 → (𝐽 ∈ Fre → 𝐾 ∈ Fre))

Proof of Theorem t1hmph
Dummy variable 𝑓 is distinct from all other variables.
StepHypRef Expression
1 t1top 23233 . 2 (𝐽 ∈ Fre → 𝐽 ∈ Top)
2 cnt1 23253 . 2 ((𝐽 ∈ Fre ∧ 𝑓: 𝐾1-1 𝐽𝑓 ∈ (𝐾 Cn 𝐽)) → 𝐾 ∈ Fre)
31, 2haushmphlem 23690 1 (𝐽𝐾 → (𝐽 ∈ Fre → 𝐾 ∈ Fre))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wcel 2109   cuni 4861   class class class wbr 5095  Frect1 23210  chmph 23657
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-sep 5238  ax-nul 5248  ax-pow 5307  ax-pr 5374  ax-un 7675
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-rab 3397  df-v 3440  df-sbc 3745  df-csb 3854  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4479  df-pw 4555  df-sn 4580  df-pr 4582  df-op 4586  df-uni 4862  df-iun 4946  df-br 5096  df-opab 5158  df-mpt 5177  df-id 5518  df-xp 5629  df-rel 5630  df-cnv 5631  df-co 5632  df-dm 5633  df-rn 5634  df-res 5635  df-ima 5636  df-suc 6317  df-iota 6442  df-fun 6488  df-fn 6489  df-f 6490  df-f1 6491  df-fo 6492  df-f1o 6493  df-fv 6494  df-ov 7356  df-oprab 7357  df-mpo 7358  df-1st 7931  df-2nd 7932  df-1o 8395  df-map 8762  df-top 22797  df-topon 22814  df-cld 22922  df-cn 23130  df-t1 23217  df-hmeo 23658  df-hmph 23659
This theorem is referenced by:  t1r0  23724  ist1-5  23725
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