Operador positivo

pt

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Operador positivo

Quality:

Positive element - self-adjoint (or Hermitian) element A of a C*-algebra A is called positive if its spectrum σ (A) consists of non-negative real numbers. Article “Operador positivo” in Portuguese Wikipedia has 1.5 points for quality (as of July 1, 2025). The article also contains templates indicating quality issues, therefore its score was reduced by 0.08 points.

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

Since the creation of article “Operador positivo”, its content was written by 3 registered users of Portuguese Wikipedia and edited by 61 registered Wikipedia users in all languages.

The article is cited 6 times in Portuguese Wikipedia and cited 67 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (Portuguese): #24343 in August 2021
  • Global: #50344 in February 2004

The highest popularity rank from 2008:

  • Local (Portuguese): #161443 in December 2008
  • Global: #860151 in April 2023

There are 6 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
1Russian (ru)
Положительный оператор (гильбертово пространство)
31.062
2English (en)
Positive operator
14.0696
3Czech (cs)
Pozitivní operátor
2.6107
4Portuguese (pt)
Operador positivo
1.4821
5Esperanto (eo)
Pozitiva ero
1.2752
6Spanish (es)
Elemento positivo
0.1468
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 "Operador positivo" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Positive operator
146 588
2Russian (ru)
Положительный оператор (гильбертово пространство)
22 332
3Spanish (es)
Elemento positivo
15 480
4Portuguese (pt)
Operador positivo
8 106
5Esperanto (eo)
Pozitiva ero
2 606
6Czech (cs)
Pozitivní operátor
2 116
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 "Operador positivo" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Positive operator
1 559
2Russian (ru)
Положительный оператор (гильбертово пространство)
97
3Esperanto (eo)
Pozitiva ero
19
4Spanish (es)
Elemento positivo
18
5Portuguese (pt)
Operador positivo
16
6Czech (cs)
Pozitivní operátor
6
More...

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

The highest AI

Language versions of the article "Operador positivo" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Positive operator
39
2Spanish (es)
Elemento positivo
8
3Esperanto (eo)
Pozitiva ero
6
4Portuguese (pt)
Operador positivo
3
5Russian (ru)
Положительный оператор (гильбертово пространство)
3
6Czech (cs)
Pozitivní operátor
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 "Operador positivo" with the highest AI in June 2025
#LanguageAI awardRelative AI
1Czech (cs)
Pozitivní operátor
0
2English (en)
Positive operator
0
3Esperanto (eo)
Pozitiva ero
0
4Spanish (es)
Elemento positivo
0
5Portuguese (pt)
Operador positivo
0
6Russian (ru)
Положительный оператор (гильбертово пространство)
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 "Operador positivo" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Positive operator
38
2Spanish (es)
Elemento positivo
8
3Portuguese (pt)
Operador positivo
6
4Russian (ru)
Положительный оператор (гильбертово пространство)
6
5Czech (cs)
Pozitivní operátor
5
6Esperanto (eo)
Pozitiva ero
4
More...

Scores

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

Quality measures

Interwikis

#LanguageValue
csCzech
Pozitivní operátor
enEnglish
Positive operator
eoEsperanto
Pozitiva ero
esSpanish
Elemento positivo
ptPortuguese
Operador positivo
ruRussian
Положительный оператор (гильбертово пространство)

Popularity rank trends

Best Rank Portuguese:
#161443
12.2008
Global:
#860151
04.2023

AI rank trends

Best Rank Portuguese:
#24343
08.2021
Global:
#50344
02.2004

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Positive element from Wikipedia articles about Positive semidefinite, Positive definiteness, Normal operator, Self-adjoint operator and Trace class operator. Whereas reading the article about Positive element people most often go to Wikipedia articles on Self-adjoint operator, Density matrix, Polarization identity, Hellinger–Toeplitz theorem and Inner product space.

Cumulative results of quality and popularity of the Wikipedia article

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

News from 21 February 2026

On 21 February 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: Jeffrey Epstein, Alysa Liu, Eric Dane, 2026 Winter Olympics, Rebecca Gayheart, Johannes Høsflot Klæbo, Wuthering Heights, amyotrophic lateral sclerosis, Andrew Mountbatten-Windsor, John F. Kennedy Jr..

In Portuguese Wikipedia the most popular articles on that day were: Eric Dane, Jeffrey Epstein, Resultados do Carnaval do Rio de Janeiro em 2026, Bad Bunny, Mark Kerr, Rebecca Gayheart, Trace Brasil, Lais Souza, Alysa Liu, Esclerose lateral amiotrófica.

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