Rogata sfera Alexandera

Alexander horned sphere - topological embedding of a 2-dimensional sphere in 3-space whose interior is a 3-ball but whose exterior is not simply connected. Article “Rogata sfera Alexandera” in Polish Wikipedia has 3.3 points for quality (as of July 1, 2025).

This article has the best quality in Greek Wikipedia. However, the most popular language version of this article is English.

Since the creation of article “Rogata sfera Alexandera”, its content was written by 7 registered users of Polish Wikipedia and edited by 159 registered Wikipedia users in all languages.

The article is cited 4 times in Polish Wikipedia and cited 218 times in all languages.

The highest Authors Interest rank from 2001:

• Local (Polish): #31379 in September 2013
• Global: #59943 in November 2004

The highest popularity rank from 2008:

• Local (Polish): #31602 in May 2008
• Global: #223431 in October 2013

There are 12 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	Greek (el) Κερασφόρος σφαίρα του Αλεξάντερ		26.9346
2	English (en) Alexander horned sphere		24.0907
3	French (fr) Sphère cornue d'Alexander		19.6559
4	Spanish (es) Esfera con cuernos de Alexander		12.3982
5	Japanese (ja) アレクサンダーの角付き球面		11.3739
6	Arabic (ar) كرة ألكسندر القرنية		7.9716
7	Italian (it) Sfera di Alexander		7.3727
8	Russian (ru) Рогатая сфера Александера		6.5509
9	Korean (ko) 알렉산더의 뿔 달린 구		5.6264
10	Catalan (ca) Esfera banyuda d'Alexander		4.5735

More...

The following table shows the most popular language versions of the article.

The most popular language versions of the article "Rogata sfera Alexandera" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Alexander horned sphere		311 616
2	Polish (pl) Rogata sfera Alexandera		44 022
3	Italian (it) Sfera di Alexander		38 943
4	Spanish (es) Esfera con cuernos de Alexander		32 150
5	Japanese (ja) アレクサンダーの角付き球面		26 434
6	Russian (ru) Рогатая сфера Александера		11 717
7	French (fr) Sphère cornue d'Alexander		11 295
8	Korean (ko) 알렉산더의 뿔 달린 구		7 165
9	Arabic (ar) كرة ألكسندر القرنية		2 829
10	Ukrainian (uk) Дика сфера		1 742

More...

The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "Rogata sfera Alexandera" in June 2025

#	Language	Popularity award	Relative popularity
1	English (en) Alexander horned sphere		1 738
2	Japanese (ja) アレクサンダーの角付き球面		206
3	Russian (ru) Рогатая сфера Александера		173
4	Italian (it) Sfera di Alexander		134
5	Spanish (es) Esfera con cuernos de Alexander		78
6	French (fr) Sphère cornue d'Alexander		70
7	Korean (ko) 알렉산더의 뿔 달린 구		70
8	Polish (pl) Rogata sfera Alexandera		41
9	Arabic (ar) كرة ألكسندر القرنية		11
10	Ukrainian (uk) Дика сфера		6

More...

The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "Rogata sfera Alexandera" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Alexander horned sphere		67
2	Russian (ru) Рогатая сфера Александера		24
3	Italian (it) Sfera di Alexander		20
4	French (fr) Sphère cornue d'Alexander		13
5	Spanish (es) Esfera con cuernos de Alexander		8
6	Polish (pl) Rogata sfera Alexandera		7
7	Catalan (ca) Esfera banyuda d'Alexander		4
8	Japanese (ja) アレクサンダーの角付き球面		4
9	Korean (ko) 알렉산더의 뿔 달린 구		4
10	Ukrainian (uk) Дика сфера		4

More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "Rogata sfera Alexandera" with the highest AI in June 2025

#	Language	AI award	Relative AI
1	Arabic (ar) كرة ألكسندر القرنية		0
2	Catalan (ca) Esfera banyuda d'Alexander		0
3	Greek (el) Κερασφόρος σφαίρα του Αλεξάντερ		0
4	English (en) Alexander horned sphere		0
5	Spanish (es) Esfera con cuernos de Alexander		0
6	French (fr) Sphère cornue d'Alexander		0
7	Italian (it) Sfera di Alexander		0
8	Japanese (ja) アレクサンダーの角付き球面		0
9	Korean (ko) 알렉산더의 뿔 달린 구		0
10	Polish (pl) Rogata sfera Alexandera		0

More...

The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "Rogata sfera Alexandera" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	Italian (it) Sfera di Alexander		141
2	English (en) Alexander horned sphere		30
3	Spanish (es) Esfera con cuernos de Alexander		9
4	Russian (ru) Рогатая сфера Александера		7
5	Catalan (ca) Esfera banyuda d'Alexander		6
6	French (fr) Sphère cornue d'Alexander		6
7	Japanese (ja) アレクサンダーの角付き球面		5
8	Arabic (ar) كرة ألكسندر القرنية		4
9	Polish (pl) Rogata sfera Alexandera		4
10	Korean (ko) 알렉산더의 뿔 달린 구		3

More...

#	Language	Value
ar	Arabic كرة ألكسندر القرنية
ca	Catalan Esfera banyuda d'Alexander
el	Greek Κερασφόρος σφαίρα του Αλεξάντερ
en	English Alexander horned sphere
es	Spanish Esfera con cuernos de Alexander
fr	French Sphère cornue d'Alexander
it	Italian Sfera di Alexander
ja	Japanese アレクサンダーの角付き球面
ko	Korean 알렉산더의 뿔 달린 구
pl	Polish Rogata sfera Alexandera
ru	Russian Рогатая сфера Александера
uk	Ukrainian Дика сфера

Best Rank

Polish: #31602 05.2008

Global: #223431 10.2013

Best Rank

Polish: #31379 09.2013

Global: #59943 11.2004

On 26 January 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: killing of Alex Pretti, Alex Honnold, Nipah virus, A Knight of the Seven Kingdoms, Donald Trump, Sam Darnold, Sinners, U.S. Immigration and Customs Enforcement, Marty Supreme, deaths in 2026.

In Polish Wikipedia the most popular articles on that day were: Wielka Orkiestra Świątecznej Pomocy, Wirus Nipah, Jadwiga Żak-Stewart, Jerzy Owsiak, Maddison Inglis, Leszek Bubel, Lista najstarszych ludzi w Polsce, Iga Świątek, Ocean strachu 2, Magdalena Prokopowicz.

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information