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Theorem t1hmph 23824
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 23363 . 2 (𝐽 ∈ Fre → 𝐽 ∈ Top)
2 cnt1 23383 . 2 ((𝐽 ∈ Fre ∧ 𝑓: 𝐾1-1 𝐽𝑓 ∈ (𝐾 Cn 𝐽)) → 𝐾 ∈ Fre)
31, 2haushmphlem 23820 1 (𝐽𝐾 → (𝐽 ∈ Fre → 𝐾 ∈ Fre))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wcel 2108   cuni 4915   class class class wbr 5151  Frect1 23340  chmph 23787
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1794  ax-4 1808  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2708  ax-sep 5305  ax-nul 5315  ax-pow 5374  ax-pr 5441  ax-un 7761
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1542  df-fal 1552  df-ex 1779  df-nf 1783  df-sb 2065  df-mo 2540  df-eu 2569  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2892  df-ne 2941  df-ral 3062  df-rex 3071  df-rab 3437  df-v 3483  df-sbc 3795  df-csb 3912  df-dif 3969  df-un 3971  df-in 3973  df-ss 3983  df-nul 4343  df-if 4535  df-pw 4610  df-sn 4635  df-pr 4637  df-op 4641  df-uni 4916  df-iun 5001  df-br 5152  df-opab 5214  df-mpt 5235  df-id 5587  df-xp 5699  df-rel 5700  df-cnv 5701  df-co 5702  df-dm 5703  df-rn 5704  df-res 5705  df-ima 5706  df-suc 6398  df-iota 6522  df-fun 6571  df-fn 6572  df-f 6573  df-f1 6574  df-fo 6575  df-f1o 6576  df-fv 6577  df-ov 7441  df-oprab 7442  df-mpo 7443  df-1st 8022  df-2nd 8023  df-1o 8514  df-map 8876  df-top 22925  df-topon 22942  df-cld 23052  df-cn 23260  df-t1 23347  df-hmeo 23788  df-hmph 23789
This theorem is referenced by:  t1r0  23854  ist1-5  23855
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