反対圏

ja

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反対圏

Quality:

Opposite category - category constructed from another category C, whose objects are the same as those of C, whose morphisms from X to Y are the same as the morphisms in C from Y to X. Article “反対圏” in Japanese Wikipedia has 10.5 points for quality (as of July 1, 2025). The article contains 3 references and 4 sections.

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

Since the creation of article “反対圏”, its content was written by 3 registered users of Japanese Wikipedia and edited by 62 registered Wikipedia users in all languages.

The article is cited 78 times in Japanese Wikipedia and cited 257 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (Japanese): #29784 in August 2015
  • Global: #65718 in November 2003

The highest popularity rank from 2008:

  • Local (Japanese): #552621 in April 2024
  • Global: #1155164 in October 2010

There are 8 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
1Ukrainian (uk)
Двоїста категорія
15.0216
2Czech (cs)
Opačná kategorie
13.7171
3Russian (ru)
Двойственная категория
13.1344
4English (en)
Opposite category
13.1027
5French (fr)
Catégorie opposée
10.9129
6Japanese (ja)
反対圏
10.5452
7Dutch (nl)
Tegenovergestelde categorie
2.3926
8Spanish (es)
Categoría opuesta
1.9465
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 "反対圏" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Opposite category
116 303
2Russian (ru)
Двойственная категория
15 999
3Japanese (ja)
反対圏
8 305
4Dutch (nl)
Tegenovergestelde categorie
4 106
5Ukrainian (uk)
Двоїста категорія
1 287
6Spanish (es)
Categoría opuesta
954
7Czech (cs)
Opačná kategorie
389
8French (fr)
Catégorie opposée
219
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 "反対圏" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Opposite category
870
2Japanese (ja)
反対圏
68
3Russian (ru)
Двойственная категория
43
4French (fr)
Catégorie opposée
17
5Spanish (es)
Categoría opuesta
16
6Dutch (nl)
Tegenovergestelde categorie
11
7Czech (cs)
Opačná kategorie
6
8Ukrainian (uk)
Двоїста категорія
6
More...

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

The highest AI

Language versions of the article "反対圏" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Opposite category
18
2Russian (ru)
Двойственная категория
17
3Dutch (nl)
Tegenovergestelde categorie
7
4Ukrainian (uk)
Двоїста категорія
6
5Czech (cs)
Opačná kategorie
4
6French (fr)
Catégorie opposée
4
7Spanish (es)
Categoría opuesta
3
8Japanese (ja)
反対圏
3
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 "反対圏" with the highest AI in June 2025
#LanguageAI awardRelative AI
1French (fr)
Catégorie opposée
1
2Czech (cs)
Opačná kategorie
0
3English (en)
Opposite category
0
4Spanish (es)
Categoría opuesta
0
5Japanese (ja)
反対圏
0
6Dutch (nl)
Tegenovergestelde categorie
0
7Russian (ru)
Двойственная категория
0
8Ukrainian (uk)
Двоїста категорія
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 "反対圏" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Opposite category
127
2Japanese (ja)
反対圏
78
3Russian (ru)
Двойственная категория
14
4Czech (cs)
Opačná kategorie
11
5Ukrainian (uk)
Двоїста категорія
11
6Spanish (es)
Categoría opuesta
9
7French (fr)
Catégorie opposée
4
8Dutch (nl)
Tegenovergestelde categorie
3
More...

Scores

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

Quality measures

Interwikis

#LanguageValue
csCzech
Opačná kategorie
enEnglish
Opposite category
esSpanish
Categoría opuesta
frFrench
Catégorie opposée
jaJapanese
反対圏
nlDutch
Tegenovergestelde categorie
ruRussian
Двойственная категория
ukUkrainian
Двоїста категорія

Popularity rank trends

Best Rank Japanese:
#552621
04.2024
Global:
#1155164
10.2010

AI rank trends

Best Rank Japanese:
#29784
08.2015
Global:
#65718
11.2003

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Opposite category from Wikipedia articles about Dual, Functor, Category theory, Category and Monoid object. Whereas reading the article about Opposite category people most often go to Wikipedia articles on Functor, Dual, Comma category, Dual object and Stone space.

Cumulative results of quality and popularity of the Wikipedia article

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

News from 10 February 2026

On 10 February 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: Jeffrey Epstein, Ghislaine Maxwell, Ilia Malinin, Bad Bunny, 2026 Winter Olympics, Epstein files, Jutta Leerdam, Jake Paul, Puerto Rico, Little Saint James.

In Japanese Wikipedia the most popular articles on that day were: 羽賀研二, 神尾楓珠, 村瀬心椛, 平手友梨奈, 田中理佐, 建国記念の日, 安野貴博, 神木隆之介, 高市早苗, 髙木美帆.

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