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Theorem topontopn 22886
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 22860 . . . 4 (𝐽 ∈ (TopOn‘𝐴) → 𝐴 = 𝐽)
2 eqimss2 3993 . . . 4 (𝐴 = 𝐽 𝐽𝐴)
31, 2syl 17 . . 3 (𝐽 ∈ (TopOn‘𝐴) → 𝐽𝐴)
4 sspwuni 5055 . . 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 17357 . 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 1541  wcel 2113  wss 3901  𝒫 cpw 4554   cuni 4863  cfv 6492  Basecbs 17138  TopSetcts 17185  TopOpenctopn 17343  TopOnctopon 22856
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2184  ax-ext 2708  ax-rep 5224  ax-sep 5241  ax-nul 5251  ax-pow 5310  ax-pr 5377  ax-un 7680
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3061  df-reu 3351  df-rab 3400  df-v 3442  df-sbc 3741  df-csb 3850  df-dif 3904  df-un 3906  df-in 3908  df-ss 3918  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4581  df-pr 4583  df-op 4587  df-uni 4864  df-iun 4948  df-br 5099  df-opab 5161  df-mpt 5180  df-id 5519  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-ov 7361  df-oprab 7362  df-mpo 7363  df-1st 7933  df-2nd 7934  df-rest 17344  df-topn 17345  df-topon 22857
This theorem is referenced by:  tsettps  22887  xrstopn  23154  cnfldms  24721  cnfldtopn  24727
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