Theorem istpsi 22982

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 2770	. . 3 ⊢ 𝐴 = (Base‘𝐾)
5		istpsi.j	. . . 4 ⊢ (TopOpen‘𝐾) = 𝐽
6	5	eqcomi 2770	. . 3 ⊢ 𝐽 = (TopOpen‘𝐾)
7	4, 6	istps2 22975	. 2 ⊢ (𝐾 ∈ TopSp ↔ (𝐽 ∈ Top ∧ 𝐴 = ∪ 𝐽))
8	1, 2, 7	mpbir2an 721	1 ⊢ 𝐾 ∈ TopSp

Syntax hints:   = wceq 1559   ∈ wcel 2141  ∪ cuni 4864  ‘cfv 6517  Basecbs 17228  TopOpenctopn 17433  Topctop 22933  TopSpctps 22972

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-sep 5245  ax-nul 5255  ax-pow 5321  ax-pr 5389  ax-un 7714

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-nf 1803  df-sb 2090  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3076  df-rex 3086  df-rab 3414  df-v 3455  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4582  df-pr 4584  df-op 4588  df-uni 4865  df-br 5100  df-opab 5162  df-mpt 5181  df-id 5540  df-xp 5651  df-rel 5652  df-cnv 5653  df-co 5654  df-dm 5655  df-iota 6473  df-fun 6519  df-fv 6525  df-top 22934  df-topon 22951  df-topsp 22973

This theorem is referenced by:  indistps2  23052