Theorem istps2 22788

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

Step	Hyp	Ref	Expression
1		istps.a	. . 3 ⊢ 𝐴 = (Base‘𝐾)
2		istps.j	. . 3 ⊢ 𝐽 = (TopOpen‘𝐾)
3	1, 2	istps 22787	. 2 ⊢ (𝐾 ∈ TopSp ↔ 𝐽 ∈ (TopOn‘𝐴))
4		istopon 22765	. 2 ⊢ (𝐽 ∈ (TopOn‘𝐴) ↔ (𝐽 ∈ Top ∧ 𝐴 = ∪ 𝐽))
5	3, 4	bitri 275	1 ⊢ (𝐾 ∈ TopSp ↔ (𝐽 ∈ Top ∧ 𝐴 = ∪ 𝐽))

Syntax hints:   ↔ wb 205   ∧ wa 395   = wceq 1533   ∈ wcel 2098  ∪ cuni 4902  ‘cfv 6536  Basecbs 17151  TopOpenctopn 17374  Topctop 22746  TopOnctopon 22763  TopSpctps 22785

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-10 2129  ax-11 2146  ax-12 2163  ax-ext 2697  ax-sep 5292  ax-nul 5299  ax-pow 5356  ax-pr 5420  ax-un 7721

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 845  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-nf 1778  df-sb 2060  df-mo 2528  df-eu 2557  df-clab 2704  df-cleq 2718  df-clel 2804  df-nfc 2879  df-ral 3056  df-rex 3065  df-rab 3427  df-v 3470  df-dif 3946  df-un 3948  df-in 3950  df-ss 3960  df-nul 4318  df-if 4524  df-pw 4599  df-sn 4624  df-pr 4626  df-op 4630  df-uni 4903  df-br 5142  df-opab 5204  df-mpt 5225  df-id 5567  df-xp 5675  df-rel 5676  df-cnv 5677  df-co 5678  df-dm 5679  df-iota 6488  df-fun 6538  df-fv 6544  df-top 22747  df-topon 22764  df-topsp 22786

This theorem is referenced by:  tpsuni  22789  tpstop  22790  istpsi  22795