# Leopold Vietoris

Leopold Vietoris | |
---|---|

Leopold Vietoris on his 110th birthday | |

Born | |

Died | (aged 110 years, 309 days) | 9 April 2002

Nationality | Austrian |

Alma mater | University of Vienna |

Known for | Contributions to topology Being a supercentenarian |

Spouse(s) | Klara Riccabona (m. 1928-1935) (her death) Maria Josefa Vincentia Vietoris, born von Riccabona zu Reichenfels (m. 1936–2002) (her death) |

Children | 6 |

Scientific career | |

Fields | Mathematics |

Institutions | University of Innsbruck |

Doctoral advisor | Gustav Ritter von Escherich Wilhelm Wirtinger |

**Leopold Vietoris** (/viːˈtɔːrɪs/; German: [viːˈtoːʀɪs]; 4 June 1891 – 9 April 2002) was an Austrian mathematician and a World War I veteran. He was born in Radkersburg and died in Innsbruck.

He was known for his contributions to topology—notably the Mayer–Vietoris sequence—and other fields of mathematics, his interest in mathematical history and for being a keen alpinist.

## Biography[edit]

Vietoris studied mathematics and geometry at the Technical University in Vienna.^{[1]}
He was drafted in 1914 in World War I and was wounded in September that same year.^{[1]} On 4 November 1918, one week before the Armistice of Villa Giusti, he became an Italian prisoner of war.^{[1]} He attended the University of Vienna, where he earned his Ph.D in 1920, with a thesis written under the supervision of Gustav von Escherich and Wilhelm Wirtinger.^{[1]}^{[2]}

In autumn 1928 he married his first wife Klara Riccabona, who later died while giving birth to their sixth daughter.^{[1]} In 1936 he married Klara's sister, Maria Riccabona.^{[1]}

Vietoris was survived by his six daughters, 17 grandchildren, and 30 great-grandchildren.^{[3]}

He lends his name to a few mathematical concepts:

**Vietoris topology**(see topological space)**Vietoris homology**(see homology theory)**Mayer–Vietoris sequence****Vietoris–Begle mapping theorem****Vietoris–Rips complex**

Vietoris remained scientifically active in his later years, even writing one paper on trigonometric sums at the age of 103.^{[4]}

Vietoris lived to be 110 years and 309 days old, and became the oldest verified^{[by whom?]} Austrian man ever.^{[citation needed]}

## Decorations and awards[edit]

- Austrian Decoration for Science and Art (1973)
- Grand Gold Decoration for Services to the Republic of Austria (1981)
- Honorary member of the German Mathematical Society (1992)

## See also[edit]

## Notes[edit]

- ^
^{a}^{b}^{c}^{d}^{e}^{f}Reitberger, Heinrich (November 2002). "Leopold Vietoris (1891-2002)" (PDF). American Mathematical Society. Retrieved 2003-09-05. **^**Leopold Vietoris at the Mathematics Genealogy Project**^**"Professor Dr. Leopold Vietoris" (PDF). Geo Imagining. Retrieved 2009-10-11.**^**Reitberger, Heinrich (November 2002). "Leopold Vietoris (1891–2002)" (PDF).*Notices of the American Mathematical Society*.**49**(10): 1235. Retrieved 26 January 2014.

## References[edit]

- Peter Weibel (ed.),
*Beyond art: a third culture: a comparative study in cultures, art, and science in 20th century Austria and Hungary*, Springer, 2005, p. 261.

- 1891 births
- 2002 deaths
- People from Bad Radkersburg
- 20th-century mathematicians
- Austrian mathematicians
- Male supercentenarians
- Members of the Austrian Academy of Sciences
- Recipients of the Austrian Decoration for Science and Art
- Recipients of the Grand Decoration for Services to the Republic of Austria
- Topologists
- Austro-Hungarian military personnel of World War I
- Austrian prisoners of war
- World War I prisoners of war held by Italy
- Austro-Hungarian mathematicians