# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/jerzy-os
# Generated: 2026-08-12T20:06:30.586Z

schema: https://schema.org/Person
url: "https://fame.am/person/jerzy-os"
name: "Jerzy Łoś"
slug: "jerzy-os"
description: "Jerzy Łoś was a Polish mathematician, logician, economist, and philosopher. He is especially known for his work in model theory, in particular for \"Łoś's theorem\", which states that any first-order formula is true in an ultraproduct if and only if it is true in \"most\" factors. In model theory he also proved many preservation theorems, but he gave significant contributions, as well, to foundations of mathematics, Abelian group theory and universal algebra. In the 60's he turned his attention to mathematical economics, focusing mainly on production processes and dynamic decision processes."
tagline: "Polish mathematician (1920-1998)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Jerzy_Los_c1955.jpg?width=1200"
gender: "male"
category:
  name: "Academics"
  slug: "academics"
profileType:
  name: "Academic"
  slug: "academic"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1920-03-22"
deathDate: "1998-06-01"
livingStatus: "DECEASED"
scores:
  popularity:           43.15
  momentum:             2.903225806451613
  historical:           8.344493333333332
  currentAttention:     0
  sourceConfidence:     54.99999999999999
  profileCompleteness:  60
  trendDirection:       "STABLE"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://pl.wikiquote.org/wiki/Jerzy_%C5%81o%C5%9B"
    title: "Wikiquote"
    type:  "WEBSITE"
  - url: "https://arz.wikipedia.org/wiki/%DA%86%D9%8A%D8%B1%D8%B2%D9%89_%D9%88%D8%B3"
    title: "چيرزى وس"
    type:  "WIKIPEDIA"
  - url: "https://ca.wikipedia.org/wiki/Jerzy_%C5%81o%C5%9B"
    title: "Jerzy Łoś"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Jerzy_%C5%81o%C5%9B"
    title: "Jerzy Łoś"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/Jerzy_%C5%81o%C5%9B"
    title: "Jerzy Łoś"
    type:  "WIKIPEDIA"
  - url: "https://es.wikipedia.org/wiki/Jerzy_%C5%81o%C5%9B"
    title: "Jerzy Łoś"
    type:  "WIKIPEDIA"
  - url: "https://hu.wikipedia.org/wiki/Jerzy_%C5%81o%C5%9B"
    title: "Jerzy Łoś"
    type:  "WIKIPEDIA"
  - url: "https://pl.wikipedia.org/wiki/Jerzy_%C5%81o%C5%9B_(logik)"
    title: "Jerzy Łoś (logik)"
    type:  "WIKIPEDIA"
  - url: "https://pms.wikipedia.org/wiki/Jerzy_%C5%81o%C5%9B"
    title: "Jerzy Łoś"
    type:  "WIKIPEDIA"
  - url: "https://uk.wikipedia.org/wiki/%D0%84%D0%B6%D0%B8_%D0%9B%D0%BE%D1%81%D1%8C"
    title: "Єжи Лось"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q548062"
    title: "Wikidata"
    type:  "WIKIDATA"

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