乌雷松引理

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乌雷松引理

Quality:

Urysohn's lemma - lemma that a topological space is normal iff any 2 disjoint closed subsets can be separated by a continuous function. Article “乌雷松引理” in Chinese Wikipedia has 10 points for quality (as of July 1, 2025). The article contains 0 references and 3 sections.

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

Since the creation of article “乌雷松引理”, its content was written by 3 registered users of Chinese Wikipedia and edited by 261 registered Wikipedia users in all languages.

The article is cited 63 times in Chinese Wikipedia and cited 477 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (Chinese): #18549 in June 2022
  • Global: #1061 in April 2002

The highest popularity rank from 2008:

  • Local (Chinese): #94448 in October 2008
  • Global: #437378 in May 2025

There are 17 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
1French (fr)
Lemme d'Urysohn
33.3312
2German (de)
Lemma von Urysohn
28.8295
3English (en)
Urysohn's lemma
19.9083
4Finnish (fi)
Urysonin lemma
15.9691
5Spanish (es)
Lema de Urysohn
15.0773
6Italian (it)
Lemma di Urysohn
14.3289
7Persian (fa)
لم اوریسون
12.07
8Hebrew (he)
הלמה של אוריסון
11.1105
9Chinese (zh)
乌雷松引理
10.0004
10Catalan (ca)
Lema d'Urysohn
9.7189
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 "乌雷松引理" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Urysohn's lemma
362 692
2German (de)
Lemma von Urysohn
36 886
3French (fr)
Lemme d'Urysohn
36 549
4Italian (it)
Lemma di Urysohn
24 405
5Polish (pl)
Lemat Urysohna
18 520
6Russian (ru)
Функциональная отделимость
15 930
7Spanish (es)
Lema de Urysohn
13 545
8Chinese (zh)
乌雷松引理
12 761
9Hebrew (he)
הלמה של אוריסון
11 421
10Portuguese (pt)
Lema de Urysohn
8 137
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 "乌雷松引理" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Urysohn's lemma
2 456
2German (de)
Lemma von Urysohn
172
3French (fr)
Lemme d'Urysohn
156
4Spanish (es)
Lema de Urysohn
144
5Italian (it)
Lemma di Urysohn
119
6Chinese (zh)
乌雷松引理
87
7Hebrew (he)
הלמה של אוריסון
60
8Russian (ru)
Функциональная отделимость
56
9Polish (pl)
Lemat Urysohna
51
10Portuguese (pt)
Lema de Urysohn
40
More...

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

The highest AI

Language versions of the article "乌雷松引理" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Urysohn's lemma
62
2Italian (it)
Lemma di Urysohn
36
3German (de)
Lemma von Urysohn
35
4French (fr)
Lemme d'Urysohn
33
5Hebrew (he)
הלמה של אוריסון
20
6Russian (ru)
Функциональная отделимость
13
7Polish (pl)
Lemat Urysohna
11
8Vietnamese (vi)
Bổ đề Urysohn
9
9Spanish (es)
Lema de Urysohn
7
10Portuguese (pt)
Lema de Urysohn
7
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 "乌雷松引理" with the highest AI in June 2025
#LanguageAI awardRelative AI
1Hebrew (he)
הלמה של אוריסון
1
2Catalan (ca)
Lema d'Urysohn
0
3German (de)
Lemma von Urysohn
0
4English (en)
Urysohn's lemma
0
5Spanish (es)
Lema de Urysohn
0
6Persian (fa)
لم اوریسون
0
7Finnish (fi)
Urysonin lemma
0
8French (fr)
Lemme d'Urysohn
0
9Italian (it)
Lemma di Urysohn
0
10Dutch (nl)
Lemma van Urysohn
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 "乌雷松引理" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1Italian (it)
Lemma di Urysohn
138
2English (en)
Urysohn's lemma
113
3Chinese (zh)
乌雷松引理
63
4Hebrew (he)
הלמה של אוריסון
43
5Ukrainian (uk)
Лема Урисона
34
6Vietnamese (vi)
Bổ đề Urysohn
22
7German (de)
Lemma von Urysohn
17
8French (fr)
Lemme d'Urysohn
9
9Polish (pl)
Lemat Urysohna
9
10Portuguese (pt)
Lema de Urysohn
6
More...

Scores

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

Quality measures

Interwikis

#LanguageValue
caCatalan
Lema d'Urysohn
deGerman
Lemma von Urysohn
enEnglish
Urysohn's lemma
esSpanish
Lema de Urysohn
faPersian
لم اوریسون
fiFinnish
Urysonin lemma
frFrench
Lemme d'Urysohn
heHebrew
הלמה של אוריסון
itItalian
Lemma di Urysohn
nlDutch
Lemma van Urysohn
plPolish
Lemat Urysohna
ptPortuguese
Lema de Urysohn
ruRussian
Функциональная отделимость
svSwedish
Urysohns lemma
ukUkrainian
Лема Урисона
viVietnamese
Bổ đề Urysohn
zhChinese
乌雷松引理

Popularity rank trends

Best Rank Chinese:
#94448
10.2008
Global:
#437378
05.2025

AI rank trends

Best Rank Chinese:
#18549
06.2022
Global:
#1061
04.2002

Global AI rank history

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Urysohn's lemma from Wikipedia articles about Tychonoffs theorem, Tietze extension theorem, Normal space, Pavel Urysohn and Separation axiom. Whereas reading the article about Urysohn's lemma people most often go to Wikipedia articles on Normal space, Tietze extension theorem, Pavel Urysohn, Mizar system and Mollifier.

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 Chinese Wikipedia the most popular articles on that day were: 朱由𣜬, 林岱樺, 林逸欣, 江油未成年人欺凌事件, 鬼滅之刃, 黃士修, 鬼滅之刃角色列表, 锦月如歌, 2025年亞洲盃籃球賽, 鬼滅之刃劇場版 無限城篇.

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