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Theorem topontopn 22825
Description: Express the predicate "is a topological space." (Contributed by Mario Carneiro, 13-Aug-2015.)
Hypotheses
Ref Expression
tsettps.a 𝐴 = (Base‘𝐾)
tsettps.j 𝐽 = (TopSet‘𝐾)
Assertion
Ref Expression
topontopn (𝐽 ∈ (TopOn‘𝐴) → 𝐽 = (TopOpen‘𝐾))

Proof of Theorem topontopn
StepHypRef Expression
1 toponuni 22799 . . . 4 (𝐽 ∈ (TopOn‘𝐴) → 𝐴 = 𝐽)
2 eqimss2 3995 . . . 4 (𝐴 = 𝐽 𝐽𝐴)
31, 2syl 17 . . 3 (𝐽 ∈ (TopOn‘𝐴) → 𝐽𝐴)
4 sspwuni 5049 . . 3 (𝐽 ⊆ 𝒫 𝐴 𝐽𝐴)
53, 4sylibr 234 . 2 (𝐽 ∈ (TopOn‘𝐴) → 𝐽 ⊆ 𝒫 𝐴)
6 tsettps.a . . 3 𝐴 = (Base‘𝐾)
7 tsettps.j . . 3 𝐽 = (TopSet‘𝐾)
86, 7topnid 17339 . 2 (𝐽 ⊆ 𝒫 𝐴𝐽 = (TopOpen‘𝐾))
95, 8syl 17 1 (𝐽 ∈ (TopOn‘𝐴) → 𝐽 = (TopOpen‘𝐾))
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1540  wcel 2109  wss 3903  𝒫 cpw 4551   cuni 4858  cfv 6482  Basecbs 17120  TopSetcts 17167  TopOpenctopn 17325  TopOnctopon 22795
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5218  ax-sep 5235  ax-nul 5245  ax-pow 5304  ax-pr 5371  ax-un 7671
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-reu 3344  df-rab 3395  df-v 3438  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4285  df-if 4477  df-pw 4553  df-sn 4578  df-pr 4580  df-op 4584  df-uni 4859  df-iun 4943  df-br 5093  df-opab 5155  df-mpt 5174  df-id 5514  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-iota 6438  df-fun 6484  df-fn 6485  df-f 6486  df-f1 6487  df-fo 6488  df-f1o 6489  df-fv 6490  df-ov 7352  df-oprab 7353  df-mpo 7354  df-1st 7924  df-2nd 7925  df-rest 17326  df-topn 17327  df-topon 22796
This theorem is referenced by:  tsettps  22826  xrstopn  23093  cnfldms  24661  cnfldtopn  24667
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