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Theorem tpstop 22880
Description: The topology extractor on a topological space is a topology. (Contributed by FL, 27-Jun-2014.)
Hypothesis
Ref Expression
tpstop.j 𝐽 = (TopOpen‘𝐾)
Assertion
Ref Expression
tpstop (𝐾 ∈ TopSp → 𝐽 ∈ Top)

Proof of Theorem tpstop
StepHypRef Expression
1 eqid 2736 . . 3 (Base‘𝐾) = (Base‘𝐾)
2 tpstop.j . . 3 𝐽 = (TopOpen‘𝐾)
31, 2istps2 22878 . 2 (𝐾 ∈ TopSp ↔ (𝐽 ∈ Top ∧ (Base‘𝐾) = 𝐽))
43simplbi 497 1 (𝐾 ∈ TopSp → 𝐽 ∈ Top)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1540  wcel 2109   cuni 4888  cfv 6536  Basecbs 17233  TopOpenctopn 17440  Topctop 22836  TopSpctps 22875
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 2708  ax-sep 5271  ax-nul 5281  ax-pow 5340  ax-pr 5407  ax-un 7734
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 2540  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2810  df-nfc 2886  df-ral 3053  df-rex 3062  df-rab 3421  df-v 3466  df-dif 3934  df-un 3936  df-in 3938  df-ss 3948  df-nul 4314  df-if 4506  df-pw 4582  df-sn 4607  df-pr 4609  df-op 4613  df-uni 4889  df-br 5125  df-opab 5187  df-mpt 5207  df-id 5553  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-iota 6489  df-fun 6538  df-fv 6544  df-top 22837  df-topon 22854  df-topsp 22876
This theorem is referenced by:  mreclatdemoBAD  23039  prdstmdd  24067  invrcn  24124  cnextucn  24246  prdsxmslem2  24473  rlmbn  25318  sibfinima  34376  sibfof  34377  rrxtop  46285
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