Hilbert's twenty-first problem

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Hilbert's twenty-first problem

Quality:

Hilbert's twenty-first problem - On linear differential equations with certain properties. Article “Hilbert's twenty-first problem” in English Wikipedia has 13.5 points for quality (as of July 1, 2025). The article contains 1 references and 6 sections.

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

Since the creation of article “Hilbert's twenty-first problem”, its content was written by 32 registered users of English Wikipedia and edited by 66 registered Wikipedia users in all languages.

The article is cited 36 times in English Wikipedia and cited 176 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (English): #110853 in June 2021
  • Global: #218334 in May 2005

The highest popularity rank from 2008:

  • Local (English): #843108 in March 2014
  • Global: #1255077 in March 2014

There are 7 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.

Languages with the highest quality

#LanguageQuality gradeQuality score
1Chinese (zh)
希爾伯特第二十一問題
20.1476
2Greek (el)
Εικοστό πρώτο πρόβλημα του Χίλμπερτ
17.8307
3English (en)
Hilbert's twenty-first problem
13.4631
4Russian (ru)
Двадцать первая проблема Гильберта
12.825
5Spanish (es)
Vigésimo primer problema de Hilbert
12.3542
6Portuguese (pt)
Vigésimo-primeiro problema de Hilbert
8.5802
7Swedish (sv)
Hilberts tjugoförsta problem
1.9649
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 "Hilbert's twenty-first problem" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Hilbert's twenty-first problem
50 960
2Russian (ru)
Двадцать первая проблема Гильберта
21 444
3Chinese (zh)
希爾伯特第二十一問題
7 657
4Portuguese (pt)
Vigésimo-primeiro problema de Hilbert
1 377
5Swedish (sv)
Hilberts tjugoförsta problem
817
6Spanish (es)
Vigésimo primer problema de Hilbert
432
7Greek (el)
Εικοστό πρώτο πρόβλημα του Χίλμπερτ
57
More...

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

Most popular in June 2025

The most popular language versions of the article "Hilbert's twenty-first problem" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Hilbert's twenty-first problem
257
2Russian (ru)
Двадцать первая проблема Гильберта
73
3Chinese (zh)
希爾伯特第二十一問題
53
4Spanish (es)
Vigésimo primer problema de Hilbert
12
5Portuguese (pt)
Vigésimo-primeiro problema de Hilbert
8
6Greek (el)
Εικοστό πρώτο πρόβλημα του Χίλμπερτ
7
7Swedish (sv)
Hilberts tjugoförsta problem
7
More...

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

The highest AI

Language versions of the article "Hilbert's twenty-first problem" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Hilbert's twenty-first problem
32
2Russian (ru)
Двадцать первая проблема Гильберта
13
3Chinese (zh)
希爾伯特第二十一問題
8
4Spanish (es)
Vigésimo primer problema de Hilbert
4
5Swedish (sv)
Hilberts tjugoförsta problem
4
6Portuguese (pt)
Vigésimo-primeiro problema de Hilbert
3
7Greek (el)
Εικοστό πρώτο πρόβλημα του Χίλμπερτ
2
More...

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

The highest AI in June 2025

Language versions of the article "Hilbert's twenty-first problem" with the highest AI in June 2025
#LanguageAI awardRelative AI
1Greek (el)
Εικοστό πρώτο πρόβλημα του Χίλμπερτ
0
2English (en)
Hilbert's twenty-first problem
0
3Spanish (es)
Vigésimo primer problema de Hilbert
0
4Portuguese (pt)
Vigésimo-primeiro problema de Hilbert
0
5Russian (ru)
Двадцать первая проблема Гильберта
0
6Swedish (sv)
Hilberts tjugoförsta problem
0
7Chinese (zh)
希爾伯特第二十一問題
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 "Hilbert's twenty-first problem" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Hilbert's twenty-first problem
36
2Russian (ru)
Двадцать первая проблема Гильберта
28
3Spanish (es)
Vigésimo primer problema de Hilbert
27
4Swedish (sv)
Hilberts tjugoförsta problem
24
5Greek (el)
Εικοστό πρώτο πρόβλημα του Χίλμπερτ
23
6Chinese (zh)
希爾伯特第二十一問題
23
7Portuguese (pt)
Vigésimo-primeiro problema de Hilbert
15
More...

Scores

Estimated value for Wikipedia:
English:
Global:
Popularity in June 2025:
English:
Global:
Popularity in all years:
English:
Global:
Authors in June 2025:
English:
Global:
Registered authors in all years:
English:
Global:
Citations:
English:
Global:

Quality measures

Interwikis

#LanguageValue
elGreek
Εικοστό πρώτο πρόβλημα του Χίλμπερτ
enEnglish
Hilbert's twenty-first problem
esSpanish
Vigésimo primer problema de Hilbert
ptPortuguese
Vigésimo-primeiro problema de Hilbert
ruRussian
Двадцать первая проблема Гильберта
svSwedish
Hilberts tjugoförsta problem
zhChinese
希爾伯特第二十一問題

Popularity rank trends

Best Rank English:
#843108
03.2014
Global:
#1255077
03.2014

AI rank trends

Best Rank English:
#110853
06.2021
Global:
#218334
05.2005

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Hilbert's twenty-first problem from Wikipedia articles about Hilberts problems, Riemann–Hilbert correspondence, Andrei Bolibrukh, Riemann–Hilbert problems and Monodromy. Whereas reading the article about Hilbert's twenty-first problem people most often go to Wikipedia articles on Hilberts problems, Monodromy, Riemann–Hilbert problems, Riemann–Hilbert correspondence and Andrei Bolibrukh.

Cumulative results of quality and popularity of the Wikipedia article

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

News from 15 February 2026

On 15 February 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: Jeffrey Epstein, Wuthering Heights, 2026 Winter Olympics, Epstein files, Ilia Malinin, Wuthering Heights, Ghislaine Maxwell, Lucas Pinheiro Braathen, 2026 Winter Olympics medal table, Valentine's Day.

In English Wikipedia the most popular articles on that day were: Jeffrey Epstein, Wuthering Heights, Wuthering Heights (2026 film), 2026 Winter Olympics, Lucas Pinheiro Braathen, Ice hockey at the 2026 Winter Olympics – Men's tournament, Epstein files, John F. Kennedy Jr., Anthony Kim, James Van Der Beek.

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 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