CalendarZ

  1. Home
  2. On This Day
  3. April
  4. 9
  5. Leopold Vietoris

Deaths on April 9

Leopold Vietoris
2002Apr, 9

Leopold Vietoris

Leopold Vietoris, Austrian soldier, mathematician, and academic (b. 1891)
Leopold Vietoris (; German: [viːˈtoːʀɪs]; 4 June 1891 – 9 April 2002) was an Austrian mathematician, World War I veteran and supercentenarian. 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.

References

Choose Another Date

Events on 2002

  • 16Jan

    Osama bin Laden

    The UN Security Council unanimously establishes an arms embargo and the freezing of assets of Osama bin Laden, al-Qaeda, and the remaining members of the Taliban.
  • 4Apr

    Angolan Civil War

    The Angolan government and UNITA rebels sign a peace treaty ending the Angolan Civil War.
  • 14Apr

    Hugo Chávez

    Venezuelan President Hugo Chávez returns to office two days after being ousted and arrested by the country's military.
  • 12May

    Fidel Castro

    Former US President Jimmy Carter arrives in Cuba for a five-day visit with Fidel Castro, becoming the first President of the United States, in or out of office, to visit the island since Castro's 1959 revolution.
  • 20Aug

    Saddam Hussein

    A group of Iraqis opposed to the regime of Saddam Hussein take over the Iraqi Embassy in Berlin, Germany for five hours before releasing their hostages and surrendering.