# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/mark-krein
# Generated: 2026-08-13T11:20:50.986Z

schema: https://schema.org/Person
url: "https://fame.am/person/mark-krein"
name: "Mark Krein"
slug: "mark-krein"
description: "Mark Grigorievich Krein was a Soviet mathematician, one of the major figures of the Soviet school of functional analysis. He is known for works in operator theory, the problem of moments, classical analysis and representation theory."
tagline: "Soviet mathematician (1907-1989)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Krein_memorial_plaque_for_wiki_2008.jpg?width=1200"
gender: "male"
category:
  name: "Academics"
  slug: "academics"
profileType:
  name: "Academic"
  slug: "academic"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1908-04-15"
deathDate: "1989-10-17"
livingStatus: "DECEASED"
scores:
  popularity:           48.84
  momentum:             0
  historical:           18.15489733333334
  currentAttention:     0
  sourceConfidence:     60
  profileCompleteness:  60
  trendDirection:       "FALLING"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://zh.wikipedia.org/wiki/%E9%A6%AC%E5%85%8B%C2%B7%E5%85%8B%E6%9E%97"
    title: "馬克·克林"
    type:  "WIKIPEDIA"
  - url: "https://ar.wikipedia.org/wiki/%D9%85%D8%A7%D8%B1%D9%83_%D9%83%D9%8A%D8%B1%D9%8A%D9%86"
    title: "مارك كيرين"
    type:  "WIKIPEDIA"
  - url: "https://arz.wikipedia.org/wiki/%D9%85%D8%A7%D8%B1%D9%83_%D9%83%D9%8A%D8%B1%D9%8A%D9%86"
    title: "مارك كيرين"
    type:  "WIKIPEDIA"
  - url: "https://be.wikipedia.org/wiki/%D0%9C%D0%B0%D1%80%D0%BA_%D0%A0%D1%8B%D0%B3%D0%BE%D1%80%D0%B0%D0%B2%D1%96%D1%87_%D0%9A%D1%80%D1%8D%D0%B9%D0%BD"
    title: "Марк Рыгоравіч Крэйн"
    type:  "WIKIPEDIA"
  - url: "https://ca.wikipedia.org/wiki/Mark_Krein"
    title: "Mark Krein"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Mark_Grigorjewitsch_Krein"
    title: "Mark Grigorjewitsch Krein"
    type:  "WIKIPEDIA"
  - url: "https://el.wikipedia.org/wiki/%CE%9C%CE%B1%CF%81%CE%BA_%CE%9A%CF%81%CE%AD%CE%B9%CE%BD"
    title: "Μαρκ Κρέιν"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/Mark_Krein"
    title: "Mark Krein"
    type:  "WIKIPEDIA"
  - url: "https://eo.wikipedia.org/wiki/Mark_Krein"
    title: "Mark Krein"
    type:  "WIKIPEDIA"
  - url: "https://es.wikipedia.org/wiki/Mark_Krein"
    title: "Mark Krein"
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/Mark_Krein"
    title: "Mark Krein"
    type:  "WIKIPEDIA"
  - url: "https://he.wikipedia.org/wiki/%D7%9E%D7%90%D7%A8%D7%A7_%D7%A7%D7%A8%D7%99%D7%99%D7%9F"
    title: "מארק קריין"
    type:  "WIKIPEDIA"
  - url: "https://hy.wikipedia.org/wiki/%D5%84%D5%A1%D6%80%D5%AF_%D4%BF%D6%80%D5%A5%D5%B5%D5%B6"
    title: "Մարկ Կրեյն"
    type:  "WIKIPEDIA"
  - url: "https://it.wikipedia.org/wiki/Mark_Krejn"
    title: "Mark Krejn"
    type:  "WIKIPEDIA"
  - url: "https://ja.wikipedia.org/wiki/%E3%83%9E%E3%83%AB%E3%82%AF%E3%83%BB%E3%82%AF%E3%83%AC%E3%82%A4%E3%83%B3"
    title: "マルク・クレイン"
    type:  "WIKIPEDIA"
  - url: "https://ko.wikipedia.org/wiki/%EB%A7%88%EB%A5%B4%ED%81%AC_%ED%81%AC%EB%A0%88%EC%9D%B8"
    title: "마르크 크레인"
    type:  "WIKIPEDIA"
  - url: "https://pl.wikipedia.org/wiki/Mark_Krejn"
    title: "Mark Krejn"
    type:  "WIKIPEDIA"
  - url: "https://pt.wikipedia.org/wiki/Mark_Krein"
    title: "Mark Krein"
    type:  "WIKIPEDIA"
  - url: "https://ru.wikipedia.org/wiki/%D0%9A%D1%80%D0%B5%D0%B9%D0%BD%2C_%D0%9C%D0%B0%D1%80%D0%BA_%D0%93%D1%80%D0%B8%D0%B3%D0%BE%D1%80%D1%8C%D0%B5%D0%B2%D0%B8%D1%87"
    title: "Крейн, Марк Григорьевич"
    type:  "WIKIPEDIA"
  - url: "https://sk.wikipedia.org/wiki/Mark_Grigorievi%C4%8D_Krejn"
    title: "Mark Grigorievič Krejn"
    type:  "WIKIPEDIA"
  - url: "https://uk.wikipedia.org/wiki/%D0%9A%D1%80%D0%B5%D0%B9%D0%BD_%D0%9C%D0%B0%D1%80%D0%BA%D0%BE_%D0%93%D1%80%D0%B8%D0%B3%D0%BE%D1%80%D0%BE%D0%B2%D0%B8%D1%87"
    title: "Крейн Марко Григорович"
    type:  "WIKIPEDIA"
  - url: "https://uz.wikipedia.org/wiki/Mark_Kreyn"
    title: "Mark Kreyn"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q950211"
    title: "Wikidata"
    type:  "WIKIDATA"

# bio (long form, separated for readability)
bio: |
  Imported from discovery source: wikidata-dump