MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  istps2 Structured version   Visualization version   GIF version

Theorem istps2 23073
Description: Express the predicate "is a topological space." (Contributed by NM, 20-Oct-2012.)
Hypotheses
Ref Expression
istps.a 𝐴 = (Base‘𝐾)
istps.j 𝐽 = (TopOpen‘𝐾)
Assertion
Ref Expression
istps2 (𝐾 ∈ TopSp ↔ (𝐽 ∈ Top ∧ 𝐴 = 𝐽))

Proof of Theorem istps2
StepHypRef Expression
1 istps.a . . 3 𝐴 = (Base‘𝐾)
2 istps.j . . 3 𝐽 = (TopOpen‘𝐾)
31, 2istps 23072 . 2 (𝐾 ∈ TopSp ↔ 𝐽 ∈ (TopOn‘𝐴))
4 istopon 23050 . 2 (𝐽 ∈ (TopOn‘𝐴) ↔ (𝐽 ∈ Top ∧ 𝐴 = 𝐽))
53, 4bitri 278 1 (𝐾 ∈ TopSp ↔ (𝐽 ∈ Top ∧ 𝐴 = 𝐽))
Colors of variables: wff setvar class
Syntax hints:  wb 209  wa 400   = wceq 1570  wcel 2143   cuni 4873  cfv 6538  Basecbs 17270  TopOpenctopn 17475  Topctop 23031  TopOnctopon 23048  TopSpctps 23070
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5258  ax-nul 5270  ax-pow 5338  ax-pr 5406  ax-un 7734
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-iota 6494  df-fun 6540  df-fv 6546  df-top 23032  df-topon 23049  df-topsp 23071
This theorem is referenced by:  tpsuni  23074  tpstop  23075  istpsi  23080
  Copyright terms: Public domain W3C validator