Projective hierarchy

en

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Projective hierarchy

Quality:

Projective set - in descriptive set theory, a subset of a Polish space constructible by taking complements and projections of an analytic set. Article "Projective hierarchy" in English Wikipedia has 9.7 points for quality (as of July 1, 2025). The article contains 1 references and 4 sections.

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

Since the creation of article "Projective hierarchy", its content was written by 13 registered users of English Wikipedia and edited by 36 registered Wikipedia users in all languages.

The article is cited 36 times in English Wikipedia and cited 83 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (English): #77438 in December 2004
  • Global: #150202 in December 2004

The highest popularity rank from 2008:

  • Local (English): #1106278 in February 2010
  • Global: #1314298 in April 2008

There are 5 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
1German (de)
Projektive Hierarchie
31.2041
2Polish (pl)
Zbiór rzutowy
21.4751
3Korean (ko)
사영 집합
13.9014
4English (en)
Projective hierarchy
9.6959
5Japanese (ja)
射影集合
2.4648
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 "Projective hierarchy" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Projective hierarchy
51 742
2Polish (pl)
Zbiór rzutowy
13 937
3German (de)
Projektive Hierarchie
4 591
4Japanese (ja)
射影集合
2 795
5Korean (ko)
사영 집합
2 121
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 "Projective hierarchy" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Projective hierarchy
354
2German (de)
Projektive Hierarchie
37
3Japanese (ja)
射影集合
25
4Polish (pl)
Zbiór rzutowy
8
5Korean (ko)
사영 집합
5
More...

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

The highest AI

Language versions of the article "Projective hierarchy" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Projective hierarchy
13
2Polish (pl)
Zbiór rzutowy
10
3German (de)
Projektive Hierarchie
9
4Japanese (ja)
射影集合
2
5Korean (ko)
사영 집합
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 "Projective hierarchy" with the highest AI in June 2025
#LanguageAI awardRelative AI
1German (de)
Projektive Hierarchie
0
2English (en)
Projective hierarchy
0
3Japanese (ja)
射影集合
0
4Korean (ko)
사영 집합
0
5Polish (pl)
Zbiór rzutowy
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 "Projective hierarchy" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Projective hierarchy
36
2Polish (pl)
Zbiór rzutowy
17
3German (de)
Projektive Hierarchie
10
4Japanese (ja)
射影集合
10
5Korean (ko)
사영 집합
10
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
Projektive Hierarchie
enEnglish
Projective hierarchy
jaJapanese
射影集合
koKorean
사영 집합
plPolish
Zbiór rzutowy

Popularity rank trends

Best Rank English:
#1106278
02.2010
Global:
#1314298
04.2008

AI rank trends

Best Rank English:
#77438
12.2004
Global:
#150202
12.2004

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Projective set from Wikipedia articles about Analytical hierarchy, Axiom of projective determinacy, Borel hierarchy, Analytic set and Projective set. Whereas reading the article about Projective set people most often go to Wikipedia articles on Analytic set, Pointclass, Analytical hierarchy, Polish space and Borel hierarchy.

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

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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