Tietze extension theorem

en

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Tietze extension theorem

Quality:

Tietze extension theorem - theorem that continuous functions on a closed subset of a normal topological space can be extended to the entire space, preserving boundedness if necessary. Article “Tietze extension theorem” in English Wikipedia has 24.4 points for quality (as of July 1, 2025). The article contains 6 references and 8 sections.

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

Since the creation of article “Tietze extension theorem”, its content was written by 47 registered users of English Wikipedia and edited by 161 registered Wikipedia users in all languages.

The article is cited 35 times in English Wikipedia and cited 284 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (English): #4262 in May 2002
  • Global: #5277 in April 2002

The highest popularity rank from 2008:

  • Local (English): #456893 in November 2024
  • Global: #616406 in December 2021

There are 12 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
1German (de)
Fortsetzungssatz von Tietze
29.1056
2English (en)
Tietze extension theorem
24.4483
3Finnish (fi)
Tietzen jatkolause
18.5736
4Russian (ru)
Теорема Титце о продолжении
15.8791
5French (fr)
Théorème de prolongement de Tietze
13.465
6Polish (pl)
Twierdzenie Tietzego
13.2604
7Italian (it)
Teorema di estensione di Tietze
9.4558
8Hebrew (he)
משפט ההרחבה של טיצה
4.9798
9Vietnamese (vi)
Định lý mở rộng Tietze
2.5877
10Swedish (sv)
Tietzes utvidgningssats
2.5047
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 "Tietze extension theorem" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Tietze extension theorem
253 645
2German (de)
Fortsetzungssatz von Tietze
31 563
3French (fr)
Théorème de prolongement de Tietze
21 854
4Italian (it)
Teorema di estensione di Tietze
17 636
5Polish (pl)
Twierdzenie Tietzego
17 265
6Hebrew (he)
משפט ההרחבה של טיצה
9 294
7Russian (ru)
Теорема Титце о продолжении
8 680
8Finnish (fi)
Tietzen jatkolause
3 184
9Swedish (sv)
Tietzes utvidgningssats
1 753
10Vietnamese (vi)
Định lý mở rộng Tietze
1 705
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 "Tietze extension theorem" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Tietze extension theorem
1 882
2German (de)
Fortsetzungssatz von Tietze
99
3French (fr)
Théorème de prolongement de Tietze
84
4Polish (pl)
Twierdzenie Tietzego
72
5Russian (ru)
Теорема Титце о продолжении
69
6Italian (it)
Teorema di estensione di Tietze
51
7Hebrew (he)
משפט ההרחבה של טיצה
30
8Finnish (fi)
Tietzen jatkolause
9
9Vietnamese (vi)
Định lý mở rộng Tietze
9
10Persian (fa)
قضیه توسیع تیتز
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 "Tietze extension theorem" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Tietze extension theorem
47
2German (de)
Fortsetzungssatz von Tietze
32
3French (fr)
Théorème de prolongement de Tietze
16
4Italian (it)
Teorema di estensione di Tietze
15
5Polish (pl)
Twierdzenie Tietzego
15
6Finnish (fi)
Tietzen jatkolause
8
7Hebrew (he)
משפט ההרחבה של טיצה
8
8Russian (ru)
Теорема Титце о продолжении
7
9Swedish (sv)
Tietzes utvidgningssats
4
10Ukrainian (uk)
Теорема Тітце про продовження
4
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 "Tietze extension theorem" with the highest AI in June 2025
#LanguageAI awardRelative AI
1French (fr)
Théorème de prolongement de Tietze
1
2German (de)
Fortsetzungssatz von Tietze
0
3English (en)
Tietze extension theorem
0
4Persian (fa)
قضیه توسیع تیتز
0
5Finnish (fi)
Tietzen jatkolause
0
6Hebrew (he)
משפט ההרחבה של טיצה
0
7Italian (it)
Teorema di estensione di Tietze
0
8Polish (pl)
Twierdzenie Tietzego
0
9Russian (ru)
Теорема Титце о продолжении
0
10Swedish (sv)
Tietzes utvidgningssats
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 "Tietze extension theorem" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1Italian (it)
Teorema di estensione di Tietze
139
2Hebrew (he)
משפט ההרחבה של טיצה
48
3English (en)
Tietze extension theorem
35
4German (de)
Fortsetzungssatz von Tietze
15
5French (fr)
Théorème de prolongement de Tietze
13
6Polish (pl)
Twierdzenie Tietzego
8
7Russian (ru)
Теорема Титце о продолжении
8
8Ukrainian (uk)
Теорема Тітце про продовження
7
9Finnish (fi)
Tietzen jatkolause
4
10Persian (fa)
قضیه توسیع تیتز
3
More...

Scores

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

Quality measures

Interwikis

#LanguageValue
deGerman
Fortsetzungssatz von Tietze
enEnglish
Tietze extension theorem
faPersian
قضیه توسیع تیتز
fiFinnish
Tietzen jatkolause
frFrench
Théorème de prolongement de Tietze
heHebrew
משפט ההרחבה של טיצה
itItalian
Teorema di estensione di Tietze
plPolish
Twierdzenie Tietzego
ruRussian
Теорема Титце о продолжении
svSwedish
Tietzes utvidgningssats
ukUkrainian
Теорема Тітце про продовження
viVietnamese
Định lý mở rộng Tietze

Popularity rank trends

Best Rank English:
#456893
11.2024
Global:
#616406
12.2021

AI rank trends

Best Rank English:
#4262
05.2002
Global:
#5277
04.2002

Local AI rank history

Global AI rank history

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Tietze extension theorem from Wikipedia articles about Urysohns lemma, Uniform continuity, Space-filling curve, Normal space and Whitney extension theorem. Whereas reading the article about Tietze extension theorem people most often go to Wikipedia articles on Urysohns lemma, Normal space, Heinrich Franz Friedrich Tietze, Pavel Urysohn and Whitney extension theorem.

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

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In English Wikipedia the most popular articles on that day were: 98th Academy Awards, Michael B. Jordan, Paul Thomas Anderson, Jessie Buckley, Sinners (2025 film), Amy Madigan, Autumn Durald Arkapaw, Maya Rudolph, Sean Penn, Academy Awards.

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