Editing Leopold Vietoris (section)

==Biography==
Vietoris studied mathematics and geometry at the [[TU Wien|Vienna University of Technology]].<ref name="Leopold bio">{{cite web|url=https://www.ams.org/notices/200210/fea-vietoris.pdf|title=Leopold Vietoris (1891–2002)|publisher=[[American Mathematical Society]]|date=November 2002|access-date=5 September 2003|last=Reitberger|first=Heinrich}}</ref>
He was drafted in 1914 in [[World War I]] and was wounded in September that same year.<ref name="Leopold bio"/> On 4 November 1918, one week before the [[Armistice of Villa Giusti]], he became an [[Italy|Italian]] [[prisoner of war]].<ref name="Leopold bio"/> After returning to Austria, he attended the [[University of Vienna]], where he earned his [[PhD]] in 1920, with a thesis written under the supervision of [[Gustav von Escherich]] and [[Wilhelm Wirtinger]].<ref name="Leopold bio"/><ref>{{MathGenealogy|id=47600}}</ref>

In autumn 1928 he married his first wife Klara Riccabona, who later died while giving birth to their sixth daughter.<ref name="Leopold bio"/> In 1936 he married Klara's sister, Maria Riccabona.<ref name="Leopold bio"/>

Vietoris was survived by his six daughters, 17 grandchildren, and 30 great-grandchildren.<ref>{{cite web|url=http://www.geoimaging.tugraz.at/viktor.kaufmann/HMRSC-VI%20Dedication.pdf|title=Professor Dr. Leopold Vietoris|publisher=Geo Imagining|access-date=11 October 2009}}</ref>

He lends his name to a few mathematical concepts:
*'''Vietoris topology''' (see [[topological space]])
*'''Vietoris [[homology (mathematics)|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.<ref name=Reitberger2002>
{{Cite journal
  | last = Reitberger
  | first = Heinrich
  |date=November 2002
  | title = Leopold Vietoris (1891–2002)
  | journal = [[Notices of the American Mathematical Society]]
  | volume = 49
  | issue = 10
  | page = 1235
  | url = https://www.ams.org/notices/200210/fea-vietoris.pdf}}</ref>

Vietoris lived to be 110 years and 309 days old, and became the oldest verified Austrian man ever.<ref>{{cite web|url=http://www.grg.org/Adams/b.HTM|title=Verified Supercentenarians (Ranked By Age) Gerontology Research Group|date=1 January 2014|access-date=28 February 2019}}</ref>