# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/heinrich-franz-friedrich-tietze
# Generated: 2026-08-16T12:51:11.852Z

schema: https://schema.org/Person
url: "https://fame.am/person/heinrich-franz-friedrich-tietze"
name: "Heinrich Franz Friedrich Tietze"
slug: "heinrich-franz-friedrich-tietze"
description: "Heinrich Franz Friedrich Tietze was an Austrian mathematician, famous for the Tietze extension theorem on functions from topological spaces to the real numbers. He also developed the Tietze transformations for group presentations, and was the first to pose the group isomorphism problem. Tietze's graph is also named after him; it describes the boundaries of a subdivision of the Möbius strip into six mutually-adjacent regions, found by Tietze as part of an extension of the four color theorem to non-orientable surfaces."
tagline: "Austrian mathematician (1880–1964)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Fritz_Hartogs%2C_Heinrich_Tietze.jpeg?width=1200"
gender: "male"
country:
  name: "Austria"
  isoCode: "AT"
category:
  name: "Academics"
  slug: "academics"
profileType:
  name: "Academic"
  slug: "academic"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1880-08-31"
deathDate: "1964-02-17"
livingStatus: "DECEASED"
scores:
  popularity:           42.11
  momentum:             0
  historical:           11.608136
  currentAttention:     0
  sourceConfidence:     60
  profileCompleteness:  70
  trendDirection:       "FALLING"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://uk.wikipedia.org/wiki/%D0%93%D0%B5%D0%BD%D1%80%D1%96%D1%85_%D0%A4%D1%80%D0%B0%D0%BD%D1%86_%D0%A4%D1%80%D1%96%D0%B4%D1%80%D1%96%D1%85_%D0%A2%D1%96%D1%82%D1%86%D0%B5"
    title: "Генріх Франц Фрідріх Тітце"
    type:  "WIKIPEDIA"
  - url: "https://ar.wikipedia.org/wiki/%D9%87%D8%A7%D9%8A%D9%86%D8%B1%D9%8A%D8%B4_%D9%81%D8%B1%D8%A7%D9%86%D8%B2_%D9%81%D8%B1%D9%8A%D8%AF%D8%B1%D9%8A%D8%B4_%D8%AA%D9%8A%D8%AA%D8%B2"
    title: "هاينريش فرانز فريدريش تيتز"
    type:  "WIKIPEDIA"
  - url: "https://arz.wikipedia.org/wiki/%D9%87%D8%A7%D9%8A%D9%86%D8%B1%D9%8A%D8%B4_%D9%81%D8%B1%D8%A7%D9%86%D8%B2_%D9%81%D8%B1%D9%8A%D8%AF%D8%B1%D9%8A%D8%B4_%D8%AA%D9%8A%D8%AA%D8%B2"
    title: "هاينريش فرانز فريدريش تيتز"
    type:  "WIKIPEDIA"
  - url: "https://ca.wikipedia.org/wiki/Heinrich_Tietze"
    title: "Heinrich Tietze"
    type:  "WIKIPEDIA"
  - url: "https://cs.wikipedia.org/wiki/Heinrich_Tietze"
    title: "Heinrich Tietze"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Heinrich_Tietze"
    title: "Heinrich Tietze"
    type:  "WIKIPEDIA"
  - url: "https://el.wikipedia.org/wiki/%CE%A7%CE%AC%CE%B9%CE%BD%CF%81%CE%B9%CF%87_%CE%A4%CE%AF%CF%84%CE%B6%CE%B5"
    title: "Χάινριχ Τίτζε"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/Heinrich_Tietze"
    title: "Heinrich Tietze"
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/Heinrich_Tietze"
    title: "Heinrich Tietze"
    type:  "WIKIPEDIA"
  - url: "https://mk.wikipedia.org/wiki/%D0%A5%D0%B0%D1%98%D0%BD%D1%80%D0%B8%D1%85_%D0%A2%D0%B8%D1%86%D0%B5"
    title: "Хајнрих Тице"
    type:  "WIKIPEDIA"
  - url: "https://pl.wikipedia.org/wiki/Heinrich_Tietze"
    title: "Heinrich Tietze"
    type:  "WIKIPEDIA"
  - url: "https://pt.wikipedia.org/wiki/Heinrich_Tietze"
    title: "Heinrich Tietze"
    type:  "WIKIPEDIA"
  - url: "https://ru.wikipedia.org/wiki/%D0%A2%D0%B8%D1%82%D1%86%D0%B5%2C_%D0%93%D0%B5%D0%BD%D1%80%D0%B8%D1%85_%D0%A4%D1%80%D0%B8%D0%B4%D1%80%D0%B8%D1%85"
    title: "Титце, Генрих Фридрих"
    type:  "WIKIPEDIA"
  - url: "https://sk.wikipedia.org/wiki/Heinrich_Tietze"
    title: "Heinrich Tietze"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q84554"
    title: "Wikidata"
    type:  "WIKIDATA"

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