Combinatorial species

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Combinatorial species

Quality:

Combinatorial species - endofunctor on the category of finite sets and bijections, which can be used to analyse discrete structures in terms of generating functions. Article “Combinatorial species” in English Wikipedia has 44.3 points for quality (as of July 1, 2026). The article contains 15 references and 13 sections. The article also contains templates indicating quality issues, therefore its score was reduced by 2.33 points.

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

Since the creation of article “Combinatorial species”, its content was written by 61 registered users of English Wikipedia and edited by 97 registered Wikipedia users in all languages.

The article is cited 20 times in English Wikipedia and cited 36 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (English): #7547 in January 2003
  • Global: #11537 in January 2003

The highest popularity rank from 2008:

  • Local (English): #659232 in February 2022
  • Global: #977191 in January 2012

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, 2026 (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)
Combinatorial species
44.2712
2Romanian (ro)
Specii (matematică)
31.2175
3French (fr)
Espèce (combinatoire)
29.04
4Spanish (es)
Especies combinatorias
12.613
5Russian (ru)
Тип структуры
3.145
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 "Combinatorial species" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Combinatorial species
122 688
2Romanian (ro)
Specii (matematică)
10 991
3Russian (ru)
Тип структуры
6 458
4Spanish (es)
Especies combinatorias
841
5French (fr)
Espèce (combinatoire)
117
More...

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

Most popular in June 2026

The most popular language versions of the article "Combinatorial species" in June 2026
#LanguagePopularity awardRelative popularity
1English (en)
Combinatorial species
551
2Russian (ru)
Тип структуры
32
3French (fr)
Espèce (combinatoire)
28
4Romanian (ro)
Specii (matematică)
14
5Spanish (es)
Especies combinatorias
8
More...

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

The highest AI

Language versions of the article "Combinatorial species" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Combinatorial species
61
2Russian (ru)
Тип структуры
22
3Romanian (ro)
Specii (matematică)
8
4Spanish (es)
Especies combinatorias
5
5French (fr)
Espèce (combinatoire)
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 2026

Language versions of the article "Combinatorial species" with the highest AI in June 2026
#LanguageAI awardRelative AI
1English (en)
Combinatorial species
0
2Spanish (es)
Especies combinatorias
0
3French (fr)
Espèce (combinatoire)
0
4Romanian (ro)
Specii (matematică)
0
5Russian (ru)
Тип структуры
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 "Combinatorial species" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Combinatorial species
20
2French (fr)
Espèce (combinatoire)
7
3Romanian (ro)
Specii (matematică)
6
4Spanish (es)
Especies combinatorias
2
5Russian (ru)
Тип структуры
1
More...

Scores

Estimated value for Wikipedia:
English:
Global:
Popularity in June 2026:
English:
Global:
Popularity in all years:
English:
Global:
Authors in June 2026:
English:
Global:
Registered authors in all years:
English:
Global:
Citations:
English:
Global:

Quality measures

Interwikis

#LanguageValue
enEnglish
Combinatorial species
esSpanish
Especies combinatorias
frFrench
Espèce (combinatoire)
roRomanian
Specii (matematică)
ruRussian
Тип структуры

Popularity rank trends

Best Rank English:
#659232
02.2022
Global:
#977191
01.2012

AI rank trends

Best Rank English:
#7547
01.2003
Global:
#11537
01.2003

Local AI rank history

Languages comparison

Important global interconnections (July 2025 – June 2026)

Wikipedia readers most often find their way to information on Combinatorial species from Wikipedia articles about Mathematical structure, Pólya enumeration theorem, André Joyal, Enumerative combinatorics and Symbolic method. Whereas reading the article about Combinatorial species people most often go to Wikipedia articles on André Joyal, Container, S-object, Generating function and Polynomial functor.

Cumulative results of quality and popularity of the Wikipedia article

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

News from 1 July 2026

On 1 July 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2026 FIFA World Cup, Kylian Mbappé, Erling Haaland, Democratic Republic of the Congo, FIFA World Cup, Harry Kane, Romelu Lukaku, Senegal, Michael Olise, Sadio Mané.

In English Wikipedia the most popular articles on that day were: 2026 FIFA World Cup, Harry Kane, Julián Quiñones, List of FIFA World Cup top goalscorers, Kylian Mbappé, Democratic Republic of the Congo, Erling Haaland, DR Congo national football team, Melat Kiros, FIFA World Cup.

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 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information