Inner product space

Inner product space - real or complex vector space with an additional structure called an inner product. Article “Inner product space” in English Wikipedia has 52.1 points for quality (as of July 1, 2026). The article contains 21 references and 26 sections.

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

Since the creation of article “Inner product space”, its content was written by 275 registered users of English Wikipedia and edited by 746 registered Wikipedia users in all languages.

The article is cited 1175 times in English Wikipedia and cited 3073 times in all languages.

The highest Authors Interest rank from 2001:

• Local (English): #273 in July 2001
• Global: #299 in July 2001

The highest popularity rank from 2008:

• Local (English): #21264 in April 2015
• Global: #34882 in October 2019

There are 28 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, 2026 (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) Inner product space		52.0857
2	Portuguese (pt) Espaço com produto interno		44.1706
3	Vietnamese (vi) Không gian tích trong		41.6466
4	Galician (gl) Espazo prehilbertiano		31.283
5	Hebrew (he) מרחב מכפלה פנימית		30.9133
6	German (de) Prähilbertraum		30.2613
7	Norwegian (no) Indreproduktrom		28.7654
8	Polish (pl) Przestrzeń unitarna		28.3989
9	Chinese (zh) 内积空间		27.0232
10	French (fr) Espace préhilbertien		20.3055

More...

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

The most popular language versions of the article "Inner product space" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Inner product space		6 082 288
2	Chinese (zh) 内积空间		387 212
3	Hebrew (he) מרחב מכפלה פנימית		343 320
4	German (de) Prähilbertraum		340 254
5	French (fr) Espace préhilbertien		316 577
6	Japanese (ja) 計量ベクトル空間		211 164
7	Polish (pl) Przestrzeń unitarna		176 749
8	Korean (ko) 내적 공간		142 197
9	Spanish (es) Espacio prehilbertiano		116 344
10	Russian (ru) Предгильбертово пространство		85 846

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

The most popular language versions of the article "Inner product space" in June 2026

#	Language	Popularity award	Relative popularity
1	English (en) Inner product space		14 417
2	French (fr) Espace préhilbertien		935
3	Hebrew (he) מרחב מכפלה פנימית		738
4	Japanese (ja) 計量ベクトル空間		704
5	German (de) Prähilbertraum		657
6	Chinese (zh) 内积空间		625
7	Polish (pl) Przestrzeń unitarna		502
8	Russian (ru) Предгильбертово пространство		319
9	Korean (ko) 내적 공간		253
10	Italian (it) Spazio prehilbertiano		210

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

Language versions of the article "Inner product space" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Inner product space		275
2	German (de) Prähilbertraum		80
3	French (fr) Espace préhilbertien		69
4	Hebrew (he) מרחב מכפלה פנימית		34
5	Polish (pl) Przestrzeń unitarna		34
6	Russian (ru) Предгильбертово пространство		33
7	Japanese (ja) 計量ベクトル空間		30
8	Chinese (zh) 内积空间		30
9	Italian (it) Spazio prehilbertiano		27
10	Spanish (es) Espacio prehilbertiano		21

More...

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

Language versions of the article "Inner product space" with the highest AI in June 2026

#	Language	AI award	Relative AI
1	Portuguese (pt) Espaço com produto interno		2
2	Arabic (ar) فضاء الجداء الداخلي		1
3	Italian (it) Spazio prehilbertiano		1
4	Catalan (ca) Espai prehilbertià		0
5	Czech (cs) Unitární prostor		0
6	German (de) Prähilbertraum		0
7	English (en) Inner product space		0
8	Spanish (es) Espacio prehilbertiano		0
9	Persian (fa) فضای ضرب داخلی		0
10	Finnish (fi) Sisätuloavaruus		0

More...

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

Language versions of the article "Inner product space" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	English (en) Inner product space		1 175
2	Japanese (ja) 計量ベクトル空間		196
3	Polish (pl) Przestrzeń unitarna		188
4	Hebrew (he) מרחב מכפלה פנימית		184
5	Korean (ko) 내적 공간		184
6	German (de) Prähilbertraum		152
7	Chinese (zh) 内积空间		142
8	French (fr) Espace préhilbertien		109
9	Vietnamese (vi) Không gian tích trong		105
10	Spanish (es) Espacio prehilbertiano		82

More...

#	Language	Value
ar	Arabic فضاء الجداء الداخلي
ca	Catalan Espai prehilbertià
cs	Czech Unitární prostor
de	German Prähilbertraum
en	English Inner product space
es	Spanish Espacio prehilbertiano
fa	Persian فضای ضرب داخلی
fi	Finnish Sisätuloavaruus
fr	French Espace préhilbertien
gl	Galician Espazo prehilbertiano
he	Hebrew מרחב מכפלה פנימית
hu	Hungarian Skalárszorzatos vektortér
it	Italian Spazio prehilbertiano
ja	Japanese 計量ベクトル空間
ko	Korean 내적 공간
nl	Dutch Inwendig-productruimte
nn	Norwegian (Nynorsk) Indreproduktrom
no	Norwegian Indreproduktrom
pl	Polish Przestrzeń unitarna
pt	Portuguese Espaço com produto interno
ro	Romanian Spațiu prehilbertian
ru	Russian Предгильбертово пространство
simple	Simple English Inner product space
sk	Slovak Unitárny priestor
sl	Slovenian Prehilbertov prostor
ur	Urdu اندرونی حاصل ضرب فضا
vi	Vietnamese Không gian tích trong
zh	Chinese 内积空间

Best Rank

English: #21264 04.2015

Global: #34882 10.2019

Best Rank

English: #273 07.2001

Global: #299 07.2001

On 1 July 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2026 FIFA World Cup, Kylian Mbappé, Erling Haaland, Democratic Republic of the Congo, FIFA World Cup, Harry Kane, Romelu Lukaku, Senegal, Michael Olise, Sadio Mané.

In English Wikipedia the most popular articles on that day were: 2026 FIFA World Cup, Harry Kane, Julián Quiñones, List of FIFA World Cup top goalscorers, Kylian Mbappé, Democratic Republic of the Congo, Erling Haaland, DR Congo national football team, Melat Kiros, FIFA World Cup.

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 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information