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Theorem istpsi 23265
Description: Properties that determine a topological space. (Contributed by NM, 20-Oct-2012.)
Hypotheses
Ref Expression
istpsi.b (Base‘𝐾) = 𝐴
istpsi.j (TopOpen‘𝐾) = 𝐽
istpsi.1 𝐴 = ∪ 𝐽
istpsi.2 𝐽 ∈ Top
Assertion
Ref Expression
istpsi 𝐾 ∈ TopSp

Proof of Theorem istpsi
StepHypRef Expression
1 istpsi.2 . 2 𝐽 ∈ Top
2 istpsi.1 . 2 𝐴 = ∪ 𝐽
3 istpsi.b . . . 4 (Base‘𝐾) = 𝐴
43eqcomi 2769 . . 3 𝐴 = (Base‘𝐾)
5 istpsi.j . . . 4 (TopOpen‘𝐾) = 𝐽
65eqcomi 2769 . . 3 𝐽 = (TopOpen‘𝐾)
74, 6istps2 23258 . 2 (𝐾 ∈ TopSp ↔ (𝐽 ∈ Top ∧ 𝐴 = ∪ 𝐽))
81, 2, 7mpbir2an 724 1 𝐾 ∈ TopSp
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   = wceq 1569   ∈ wcel 2144  ∪ cuni 4866  ‘cfv 6538  Basecbs 17392  TopOpenctopn 17597  Topctop 23216  TopSpctps 23255
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2212  ax-ext 2732  ax-sep 5248  ax-nul 5259  ax-pow 5326  ax-pr 5390  ax-un 7751
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-opab 5167  df-mpt 5186  df-id 5545  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-iota 6494  df-fun 6540  df-fv 6546  df-top 23217  df-topon 23234  df-topsp 23256
This theorem is used by:  indistps2  23335
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