Theorem istpsi 22964

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

Step	Hyp	Ref	Expression
1		istpsi.2	. 2 ⊢ 𝐽 ∈ Top
2		istpsi.1	. 2 ⊢ 𝐴 = ∪ 𝐽
3		istpsi.b	. . . 4 ⊢ (Base‘𝐾) = 𝐴
4	3	eqcomi 2744	. . 3 ⊢ 𝐴 = (Base‘𝐾)
5		istpsi.j	. . . 4 ⊢ (TopOpen‘𝐾) = 𝐽
6	5	eqcomi 2744	. . 3 ⊢ 𝐽 = (TopOpen‘𝐾)
7	4, 6	istps2 22957	. 2 ⊢ (𝐾 ∈ TopSp ↔ (𝐽 ∈ Top ∧ 𝐴 = ∪ 𝐽))
8	1, 2, 7	mpbir2an 711	1 ⊢ 𝐾 ∈ TopSp

Syntax hints:   = wceq 1537   ∈ wcel 2106  ∪ cuni 4912  ‘cfv 6563  Basecbs 17245  TopOpenctopn 17468  Topctop 22915  TopSpctps 22954

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965  ax-7 2005  ax-8 2108  ax-9 2116  ax-10 2139  ax-11 2155  ax-12 2175  ax-ext 2706  ax-sep 5302  ax-nul 5312  ax-pow 5371  ax-pr 5438  ax-un 7754

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1540  df-fal 1550  df-ex 1777  df-nf 1781  df-sb 2063  df-mo 2538  df-eu 2567  df-clab 2713  df-cleq 2727  df-clel 2814  df-nfc 2890  df-ral 3060  df-rex 3069  df-rab 3434  df-v 3480  df-dif 3966  df-un 3968  df-in 3970  df-ss 3980  df-nul 4340  df-if 4532  df-pw 4607  df-sn 4632  df-pr 4634  df-op 4638  df-uni 4913  df-br 5149  df-opab 5211  df-mpt 5232  df-id 5583  df-xp 5695  df-rel 5696  df-cnv 5697  df-co 5698  df-dm 5699  df-iota 6516  df-fun 6565  df-fv 6571  df-top 22916  df-topon 22933  df-topsp 22955

This theorem is referenced by:  indistps2  23035