Pi-system

en

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Pi-system

Quality:

Pi-system - family of sets closed under intersection. Article “Pi-system” in English Wikipedia has 26.2 points for quality (as of July 1, 2025). The article contains 6 references and 11 sections.

In this language version of Wikipedia the article has the best quality. Also, this article is the most popular in that (English) language version.

In June 2025 the article “Pi-system” was edited by 1 authors in English Wikipedia and written by 2 authors in all languages.

Since the creation of article “Pi-system”, its content was written by 34 registered users of English Wikipedia and edited by 76 registered Wikipedia users in all languages.

The article is cited 154 times in English Wikipedia and cited 222 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (English): #102588 in February 2013
  • Global: #75895 in October 2019

The highest popularity rank from 2008:

  • Local (English): #341771 in March 2014
  • Global: #557740 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
1English (en)
Pi-system
26.1804
2French (fr)
Pi-système
18.9352
3Portuguese (pt)
Sistema Pi
18.8188
4Spanish (es)
Sistema pi
18.5594
5Polish (pl)
Π-układ
11.9987
6German (de)
Π-System
6.797
7Italian (it)
Sistema pi
3.9372
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 "Pi-system" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Pi-system
223 818
2German (de)
Π-System
21 128
3Polish (pl)
Π-układ
10 978
4French (fr)
Pi-système
10 445
5Italian (it)
Sistema pi
8 098
6Portuguese (pt)
Sistema Pi
2 191
7Spanish (es)
Sistema pi
1 372
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 "Pi-system" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Pi-system
1 059
2German (de)
Π-System
83
3Spanish (es)
Sistema pi
83
4French (fr)
Pi-système
62
5Polish (pl)
Π-układ
62
6Italian (it)
Sistema pi
41
7Portuguese (pt)
Sistema Pi
9
More...

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

The highest AI

Language versions of the article "Pi-system" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Pi-system
34
2German (de)
Π-System
10
3French (fr)
Pi-système
10
4Italian (it)
Sistema pi
9
5Polish (pl)
Π-układ
9
6Spanish (es)
Sistema pi
3
7Portuguese (pt)
Sistema Pi
1
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 "Pi-system" with the highest AI in June 2025
#LanguageAI awardRelative AI
1English (en)
Pi-system
1
2Spanish (es)
Sistema pi
1
3German (de)
Π-System
0
4French (fr)
Pi-système
0
5Italian (it)
Sistema pi
0
6Polish (pl)
Π-układ
0
7Portuguese (pt)
Sistema Pi
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 "Pi-system" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Pi-system
154
2Polish (pl)
Π-układ
32
3German (de)
Π-System
16
4Italian (it)
Sistema pi
6
5French (fr)
Pi-système
5
6Portuguese (pt)
Sistema Pi
5
7Spanish (es)
Sistema pi
4
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
deGerman
Π-System
enEnglish
Pi-system
esSpanish
Sistema pi
frFrench
Pi-système
itItalian
Sistema pi
plPolish
Π-układ
ptPortuguese
Sistema Pi

Popularity rank trends

Best Rank English:
#341771
03.2014
Global:
#557740
03.2014

AI rank trends

Best Rank English:
#102588
02.2013
Global:
#75895
10.2019

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Pi-system from Wikipedia articles about Dynkin system, Topology, Sigma-algebra, Independent events and Monotone class theorem. Whereas reading the article about Pi-system people most often go to Wikipedia articles on Dynkin system, Sigma-algebra, Monotone class theorem, Carathéodorys extension theorem and Pi bond.

Cumulative results of quality and popularity of the Wikipedia article

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

News from 12 August 2025

On 12 August 2025 in multilingual Wikipedia, Internet users most often read articles on the following topics: Cristiano Ronaldo, Wednesday, Georgina Rodríguez, ChatGPT, Weapons, Jenna Ortega, deaths in 2025, Taylor Swift, Miguel Uribe Turbay, 2025–26 UEFA Champions League.

In English Wikipedia the most popular articles on that day were: Weapons (2025 film), Danielle Spencer (American actress), Cristiano Ronaldo, Deaths in 2025, Taylor Swift, Wednesday (TV series), Superman (2025 film), Georgina Rodríguez, Coolie (2025 film), The Fantastic Four: First Steps.

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