# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/lazar-lyusternik
# Generated: 2026-08-14T08:02:09.638Z

schema: https://schema.org/Person
url: "https://fame.am/person/lazar-lyusternik"
name: "Lazar Lyusternik"
slug: "lazar-lyusternik"
description: "Lazar Aronovich Lyusternik was a Soviet mathematician. He is famous for his work in topology and differential geometry, to which he applied the variational principle. Using the theory he introduced, together with Lev Schnirelmann, he proved the theorem of the three geodesics, a conjecture by Henri Poincaré that every convex body in 3-dimensions has at least three simple closed geodesics. The ellipsoid with distinct but nearly equal axis is the critical case with exactly three closed geodesics."
tagline: "Russian mathematician (1899–1981)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Lyusternik.jpg?width=1200"
gender: "male"
category:
  name: "Academics"
  slug: "academics"
profileType:
  name: "Academic"
  slug: "academic"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1899-12-31"
deathDate: "1981-07-22"
livingStatus: "DECEASED"
scores:
  popularity:           44.19
  momentum:             0
  historical:           12.68005866666667
  currentAttention:     0
  sourceConfidence:     60
  profileCompleteness:  60
  trendDirection:       "STABLE"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://uk.wikipedia.org/wiki/%D0%9B%D1%8E%D1%81%D1%82%D0%B5%D1%80%D0%BD%D0%B8%D0%BA_%D0%9B%D0%B0%D0%B7%D0%B0%D1%80_%D0%90%D1%80%D0%BE%D0%BD%D0%BE%D0%B2%D0%B8%D1%87"
    title: "Люстерник Лазар Аронович"
    type:  "WIKIPEDIA"
  - url: "https://arz.wikipedia.org/wiki/%D9%84%D8%A7%D8%B2%D8%A7%D8%B1_%D9%84%D9%8A%D9%88%D8%B3%D8%AA%D9%8A%D8%B1%D9%86%D9%8A%D9%83"
    title: "لازار ليوستيرنيك"
    type:  "WIKIPEDIA"
  - url: "https://ba.wikipedia.org/wiki/%D0%9B%D1%8E%D1%81%D1%82%D0%B5%D1%80%D0%BD%D0%B8%D0%BA_%D0%9B%D0%B0%D0%B7%D0%B0%D1%80%D1%8C_%D0%90%D1%80%D0%BE%D0%BD%D0%BE%D0%B2%D0%B8%D1%87"
    title: "Люстерник Лазарь Аронович"
    type:  "WIKIPEDIA"
  - url: "https://ca.wikipedia.org/wiki/Lazar_Liusternik"
    title: "Lazar Liusternik"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Lasar_Aronowitsch_Ljusternik"
    title: "Lasar Aronowitsch Ljusternik"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/Lazar_Lyusternik"
    title: "Lazar Lyusternik"
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/Lazar_Lusternik"
    title: "Lazar Lusternik"
    type:  "WIKIPEDIA"
  - url: "https://he.wikipedia.org/wiki/%D7%9C%D7%96%D7%A8_%D7%9C%D7%95%D7%A1%D7%98%D7%A8%D7%A0%D7%99%D7%A7"
    title: "לזר לוסטרניק"
    type:  "WIKIPEDIA"
  - url: "https://id.wikipedia.org/wiki/Lazar_Lyusternik"
    title: "Lazar Lyusternik"
    type:  "WIKIPEDIA"
  - url: "https://ko.wikipedia.org/wiki/%EB%9D%BC%EC%9E%90%EB%A6%AC_%EB%A5%98%EC%8A%A4%ED%85%8C%EB%A5%B4%EB%8B%88%ED%81%AC"
    title: "라자리 류스테르니크"
    type:  "WIKIPEDIA"
  - url: "https://pl.wikipedia.org/wiki/%C5%81azar_Lusternik"
    title: "Łazar Lusternik"
    type:  "WIKIPEDIA"
  - url: "https://pt.wikipedia.org/wiki/Lazar_Lyusternik"
    title: "Lazar Lyusternik"
    type:  "WIKIPEDIA"
  - url: "https://ro.wikipedia.org/wiki/Lazar_Lusternik"
    title: "Lazar Lusternik"
    type:  "WIKIPEDIA"
  - url: "https://ru.wikipedia.org/wiki/%D0%9B%D1%8E%D1%81%D1%82%D0%B5%D1%80%D0%BD%D0%B8%D0%BA%2C_%D0%9B%D0%B0%D0%B7%D0%B0%D1%80%D1%8C_%D0%90%D1%80%D0%BE%D0%BD%D0%BE%D0%B2%D0%B8%D1%87"
    title: "Люстерник, Лазарь Аронович"
    type:  "WIKIPEDIA"
  - url: "https://tt.wikipedia.org/wiki/%D0%9B%D0%B0%D0%B7%D0%B0%D1%80%D1%8C_%D0%9B%D1%8E%D1%81%D1%82%D0%B5%D1%80%D0%BD%D0%B8%D0%BA"
    title: "Лазарь Люстерник"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q1386199"
    title: "Wikidata"
    type:  "WIKIDATA"

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