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Theorem xmstps 23606
Description: An extended metric space is a topological space. (Contributed by Mario Carneiro, 26-Aug-2015.)
Assertion
Ref Expression
xmstps (𝑀 ∈ ∞MetSp → 𝑀 ∈ TopSp)

Proof of Theorem xmstps
StepHypRef Expression
1 eqid 2738 . . 3 (TopOpen‘𝑀) = (TopOpen‘𝑀)
2 eqid 2738 . . 3 (Base‘𝑀) = (Base‘𝑀)
3 eqid 2738 . . 3 ((dist‘𝑀) ↾ ((Base‘𝑀) × (Base‘𝑀))) = ((dist‘𝑀) ↾ ((Base‘𝑀) × (Base‘𝑀)))
41, 2, 3isxms 23600 . 2 (𝑀 ∈ ∞MetSp ↔ (𝑀 ∈ TopSp ∧ (TopOpen‘𝑀) = (MetOpen‘((dist‘𝑀) ↾ ((Base‘𝑀) × (Base‘𝑀))))))
54simplbi 498 1 (𝑀 ∈ ∞MetSp → 𝑀 ∈ TopSp)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1539  wcel 2106   × cxp 5587  cres 5591  cfv 6433  Basecbs 16912  distcds 16971  TopOpenctopn 17132  MetOpencmopn 20587  TopSpctps 22081  ∞MetSpcxms 23470
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-ext 2709
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-sb 2068  df-clab 2716  df-cleq 2730  df-clel 2816  df-rab 3073  df-v 3434  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-nul 4257  df-if 4460  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-br 5075  df-opab 5137  df-xp 5595  df-res 5601  df-iota 6391  df-fv 6441  df-xms 23473
This theorem is referenced by:  mstps  23608  ressxms  23681  prdsxmslem2  23685  tmsxpsmopn  23693  minveclem4a  24594  rrhcn  31947  rrhf  31948  rrexttps  31956  sitmcl  32318
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