Satz vom Igel

Quality:

Hairy ball theorem - theorem which states that there is no nonvanishing continuous tangent vector field on even-dimensional n-spheres. Article "Satz vom Igel" in German Wikipedia has 28.1 points for quality (as of November 1, 2023). The article contains 5 references and 8 sections.

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

Since the creation of article "Satz vom Igel", its content was written by 34 registered users of German Wikipedia and edited by 464 registered Wikipedia users in all languages.

The article is cited 15 times in German Wikipedia and cited 273 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (German): #15526 in June 2012
  • Global: #7053 in August 2005

The highest popularity rank from 2008:

  • Local (German): #7683 in March 2023
  • Global: #13343 in February 2016

There are 17 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 November 1, 2023 (including revision history and pageviews for previous years).

下表顯示了最高品質的文章的語言版本。

Languages with the highest quality

#LanguageQuality gradeQuality score
1Catalan (ca)
Teorema de la bola peluda
49.5444
2French (fr)
Théorème de la boule chevelue
46.1172
3Spanish (es)
Teorema de la bola peluda
42.154
4English (en)
Hairy ball theorem
40.4791
5Hebrew (he)
משפט הכדור השעיר
34.0352
6German (de)
Satz vom Igel
28.057
7Chinese (zh)
毛球定理
24.4816
8Persian (fa)
قضیه توپ مودار
21.2068
9Portuguese (pt)
Teorema da bola cabeluda
20.328
10Russian (ru)
Теорема о причёсывании ежа
18.8983
More...

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

Most popular in all the time

The most popular language versions of the article "Satz vom Igel" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Hairy ball theorem
1 956 180
2Russian (ru)
Теорема о причёсывании ежа
202 421
3Italian (it)
Teorema della palla pelosa
131 730
4German (de)
Satz vom Igel
108 919
5French (fr)
Théorème de la boule chevelue
106 822
6Spanish (es)
Teorema de la bola peluda
79 003
7Portuguese (pt)
Teorema da bola cabeluda
52 875
8Chinese (zh)
毛球定理
42 372
9Hungarian (hu)
Sündisznótétel
5 763
10Hebrew (he)
משפט הכדור השעיר
5 450
More...

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

Most popular in October 2023

The most popular language versions of the article "Satz vom Igel" in October 2023
#LanguagePopularity awardRelative popularity
1English (en)
Hairy ball theorem
37 490
2Russian (ru)
Теорема о причёсывании ежа
809
3Italian (it)
Teorema della palla pelosa
746
4French (fr)
Théorème de la boule chevelue
733
5German (de)
Satz vom Igel
506
6Spanish (es)
Teorema de la bola peluda
390
7Portuguese (pt)
Teorema da bola cabeluda
299
8Chinese (zh)
毛球定理
253
9Hebrew (he)
משפט הכדור השעיר
67
10Hungarian (hu)
Sündisznótétel
32
More...

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

The highest AI

Language versions of the article "Satz vom Igel" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Hairy ball theorem
230
2French (fr)
Théorème de la boule chevelue
60
3Russian (ru)
Теорема о причёсывании ежа
43
4German (de)
Satz vom Igel
34
5Italian (it)
Teorema della palla pelosa
22
6Portuguese (pt)
Teorema da bola cabeluda
14
7Chinese (zh)
毛球定理
11
8Esperanto (eo)
Teoremo pri erinaco
9
9Spanish (es)
Teorema de la bola peluda
7
10Danish (da)
Sætningen om den behårede kugle
6
More...

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

The highest AI in October 2023

Language versions of the article "Satz vom Igel" with the highest AI in October 2023
#LanguageAI awardRelative AI
1Catalan (ca)
Teorema de la bola peluda
0
2Danish (da)
Sætningen om den behårede kugle
0
3German (de)
Satz vom Igel
0
4English (en)
Hairy ball theorem
0
5Esperanto (eo)
Teoremo pri erinaco
0
6Spanish (es)
Teorema de la bola peluda
0
7Persian (fa)
قضیه توپ مودار
0
8Finnish (fi)
Karvapallolause
0
9French (fr)
Théorème de la boule chevelue
0
10Hebrew (he)
משפט הכדור השעיר
0
More...

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

The highest CI

Language versions of the article "Satz vom Igel" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1Italian (it)
Teorema della palla pelosa
142
2English (en)
Hairy ball theorem
42
3French (fr)
Théorème de la boule chevelue
20
4German (de)
Satz vom Igel
15
5Russian (ru)
Теорема о причёсывании ежа
11
6Hebrew (he)
משפט הכדור השעיר
8
7Chinese (zh)
毛球定理
7
8Catalan (ca)
Teorema de la bola peluda
6
9Spanish (es)
Teorema de la bola peluda
6
10Persian (fa)
قضیه توپ مودار
5
More...

Scores

Estimated value for Wikipedia:
German:
Global:
Popularity in October 2023:
German:
Global:
Popularity in all years:
German:
Global:
Authors in October 2023:
German:
Global:
Registered authors in all years:
German:
Global:
Citations:
German:
Global:

Quality measures

Interwikis

#LanguageValue
caCatalan
Teorema de la bola peluda
daDanish
Sætningen om den behårede kugle
deGerman
Satz vom Igel
enEnglish
Hairy ball theorem
eoEsperanto
Teoremo pri erinaco
esSpanish
Teorema de la bola peluda
faPersian
قضیه توپ مودار
fiFinnish
Karvapallolause
frFrench
Théorème de la boule chevelue
heHebrew
משפט הכדור השעיר
huHungarian
Sündisznótétel
itItalian
Teorema della palla pelosa
ptPortuguese
Teorema da bola cabeluda
ruRussian
Теорема о причёсывании ежа
svSwedish
Igelkottsteoremet
ukUkrainian
Теорема про причісування їжака
zhChinese
毛球定理

Popularity rank trends

Best Rank German:
#7683
03.2023
Global:
#13343
02.2016

AI rank trends

Best Rank German:
#15526
06.2012
Global:
#7053
08.2005

Local popularity rank history

Global AI rank history

Languages comparison

Important global interconnections

Wikipedia readers most often find their way to information on Hairy ball theorem from Wikipedia articles about Cox–Zucker machine, Topology, Brouwer fixed-point theorem, Hair whorl and Cowlick. Whereas reading the article about Hairy ball theorem people most often go to Wikipedia articles on Cowlick, Poincaré–Hopf theorem, Hair whorl, N-sphere and Vector field.

Cumulative results of quality and popularity of the Wikipedia article

List of Wikipedia articles in different languages (starting with the most popular):

News from 23 April 2024

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About WikiRank

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 November, 2023. When calculating current popularity and AI of articles data from October 2023 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2023... More information