Lemma del ping-pong

it

WikiRank.net
ver. 1.6.2

Lemma del ping-pong

Quality:

Ping-pong lemma - theorem about sufficient conditions for ensuring that that several elements in a group acting on a set freely generate a free subgroup of that group. Article “Lemma del ping-pong” in Italian Wikipedia has 25 points for quality (as of July 1, 2025). The article contains 18 references and 9 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 “Lemma del ping-pong”, its content was written by 2 registered users of Italian Wikipedia and edited by 65 registered Wikipedia users in all languages.

The article is cited 173 times in Italian Wikipedia and cited 197 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (Italian): #148353 in February 2024
  • Global: #231461 in May 2012

The highest popularity rank from 2008:

  • Local (Italian): #536637 in March 2024
  • Global: #865353 in October 2023

There are 9 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)
Пінг-понг лема
40.523
2English (en)
Ping-pong lemma
34.8112
3French (fr)
Lemme du ping-pong
29.4572
4Italian (it)
Lemma del ping-pong
25.027
5Portuguese (pt)
Lema do ping-pong
22.764
6Chinese (zh)
乒乓引理
19.4246
7Turkish (tr)
Klein kriteri
14.8217
8German (de)
Ping-Pong-Lemma
11.5855
9Korean (ko)
탁구 정리
7.2461
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 "Lemma del ping-pong" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Ping-pong lemma
82 434
2German (de)
Ping-Pong-Lemma
3 278
3French (fr)
Lemme du ping-pong
2 502
4Chinese (zh)
乒乓引理
2 431
5Portuguese (pt)
Lema do ping-pong
2 077
6Turkish (tr)
Klein kriteri
1 837
7Korean (ko)
탁구 정리
1 125
8Ukrainian (uk)
Пінг-понг лема
452
9Italian (it)
Lemma del ping-pong
339
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 "Lemma del ping-pong" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Ping-pong lemma
511
2French (fr)
Lemme du ping-pong
52
3German (de)
Ping-Pong-Lemma
23
4Chinese (zh)
乒乓引理
19
5Italian (it)
Lemma del ping-pong
10
6Portuguese (pt)
Lema do ping-pong
8
7Korean (ko)
탁구 정리
7
8Turkish (tr)
Klein kriteri
6
9Ukrainian (uk)
Пінг-понг лема
2
More...

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

The highest AI

Language versions of the article "Lemma del ping-pong" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Ping-pong lemma
27
2German (de)
Ping-Pong-Lemma
9
3Turkish (tr)
Klein kriteri
8
4Ukrainian (uk)
Пінг-понг лема
5
5Korean (ko)
탁구 정리
4
6Chinese (zh)
乒乓引理
4
7French (fr)
Lemme du ping-pong
3
8Portuguese (pt)
Lema do ping-pong
3
9Italian (it)
Lemma del ping-pong
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 "Lemma del ping-pong" with the highest AI in June 2025
#LanguageAI awardRelative AI
1German (de)
Ping-Pong-Lemma
0
2English (en)
Ping-pong lemma
0
3French (fr)
Lemme du ping-pong
0
4Italian (it)
Lemma del ping-pong
0
5Korean (ko)
탁구 정리
0
6Portuguese (pt)
Lema do ping-pong
0
7Turkish (tr)
Klein kriteri
0
8Ukrainian (uk)
Пінг-понг лема
0
9Chinese (zh)
乒乓引理
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 "Lemma del ping-pong" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1Italian (it)
Lemma del ping-pong
173
2English (en)
Ping-pong lemma
8
3French (fr)
Lemme du ping-pong
6
4German (de)
Ping-Pong-Lemma
3
5Korean (ko)
탁구 정리
2
6Ukrainian (uk)
Пінг-понг лема
2
7Portuguese (pt)
Lema do ping-pong
1
8Turkish (tr)
Klein kriteri
1
9Chinese (zh)
乒乓引理
1
More...

Scores

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

Quality measures

Interwikis

#LanguageValue
deGerman
Ping-Pong-Lemma
enEnglish
Ping-pong lemma
frFrench
Lemme du ping-pong
itItalian
Lemma del ping-pong
koKorean
탁구 정리
ptPortuguese
Lema do ping-pong
trTurkish
Klein kriteri
ukUkrainian
Пінг-понг лема
zhChinese
乒乓引理

Popularity rank trends

Best Rank Italian:
#536637
03.2024
Global:
#865353
10.2023

AI rank trends

Best Rank Italian:
#148353
02.2024
Global:
#231461
05.2012

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Ping-pong lemma from Wikipedia articles about Tits alternative, Geometric group theory, Matrix group, Felix Klein and List of lemmas. Whereas reading the article about Ping-pong lemma people most often go to Wikipedia articles on Tits alternative, Geometric group theory, Hyperbolic group, Free group and Matrix group.

Cumulative results of quality and popularity of the Wikipedia article

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

News from 16 March 2026

On 16 March 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 98th Academy Awards, Michael B. Jordan, Sinners, Jessie Buckley, Paul Thomas Anderson, Sean Penn, One Battle After Another, Amy Madigan, Hamnet, Timothée Chalamet.

In Italian Wikipedia the most popular articles on that day were: Premi Oscar 2026, Una battaglia dopo l'altra, Michael B. Jordan, I peccatori, Andrea Kimi Antonelli, Jessie Buckley, Sean Penn, Paul Thomas Anderson, Amy Madigan, Hamnet - Nel nome del figlio.

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