Σ

Quality:

Σ - eighteenth letter of the Greek alphabet. Article “Σ” in Chinese Wikipedia has 15.9 points for quality (as of July 1, 2025). The article contains 2 references and 2 sections.

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

Since the creation of article “Σ”, its content was written by 42 registered users of Chinese Wikipedia and edited by 2041 registered Wikipedia users in all languages.

The article is cited 93 times in Chinese Wikipedia and cited 3989 times in all languages.

The highest Authors Interest rank from 2001:

• Local (Chinese): #619 in September 2010
• Global: #1073 in February 2025

The highest popularity rank from 2008:

• Local (Chinese): #4622 in December 2019
• Global: #4303 in December 2022

There are 49 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.

#	Language	Quality grade	Quality score
1	English (en) Sigma		46.0692
2	French (fr) Sigma		45.2006
3	Greek (el) Σίγμα		30.1793
4	Simple English (simple) Sigma		29.97
5	Ukrainian (uk) Сигма		29.7795
6	Spanish (es) Σ		29.6388
7	Thai (th) ซิกมา		28.8505
8	Catalan (ca) Sigma		23.5686
9	Romanian (ro) Sigma (literă)		23.2496
10	Arabic (ar) سيغما		22.9926

The following table shows the most popular language versions of the article.

#	Language	Popularity award	Relative popularity
1	English (en) Sigma		9 020 280
2	German (de) Sigma		1 846 407
3	Japanese (ja) Σ		1 723 378
4	Russian (ru) Сигма (буква)		1 697 027
5	Spanish (es) Σ		1 661 941
6	French (fr) Sigma		924 705
7	Polish (pl) Sigma		871 102
8	Portuguese (pt) Σ		857 940
9	Italian (it) Sigma		799 282
10	Chinese (zh) Σ		646 353

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

#	Language	Popularity award	Relative popularity
1	English (en) Sigma		32 329
2	Russian (ru) Сигма (буква)		6 946
3	German (de) Sigma		5 532
4	Spanish (es) Σ		3 537
5	French (fr) Sigma		3 270
6	Polish (pl) Sigma		3 190
7	Chinese (zh) Σ		2 337
8	Korean (ko) Σ		2 310
9	Italian (it) Sigma		2 231
10	Japanese (ja) Σ		2 166

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

#	Language	AI award	Relative AI
1	English (en) Sigma		386
2	German (de) Sigma		146
3	French (fr) Sigma		129
4	Italian (it) Sigma		102
5	Russian (ru) Сигма (буква)		91
6	Dutch (nl) Sigma (letter)		75
7	Polish (pl) Sigma		74
8	Spanish (es) Σ		73
9	Norwegian (no) Sigma		66
10	Hebrew (he) סיגמא		65

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

#	Language	AI award	Relative AI
1	Spanish (es) Σ		5
2	English (en) Sigma		4
3	Italian (it) Sigma		3
4	Polish (pl) Sigma		2
5	Turkish (tr) Sigma		2
6	German (de) Sigma		1
7	Persian (fa) سیگما		1
8	Korean (ko) Σ		1
9	Portuguese (pt) Σ		1
10	Arabic (ar) سيغما		0

The following table shows the language versions of the article with the highest number of citations.

On 16 January 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: Greenland, Donald Trump, María Corina Machado, Stranger Things, The Seven Dials Mystery, deaths in 2026, Avatar: Fire and Ash, The Housemaid, 28 Years Later: The Bone Temple, Seven Dials Mystery.

In Chinese Wikipedia the most popular articles on that day were: 陽光女子合唱團, 愛情怎麼翻譯？, 聂卫平, 尋秦記 (電影), 玉茗茶骨, 尋秦記 (電視劇), 格陵兰, 李凱賢, 守诚者, 2026年印度羽毛球公開賽.

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