Stefan Banach, Date of Birth, Place of Birth, Date of Death


Stefan Banach

Polish mathematician

Date of Birth: 30-Mar-1892

Place of Birth: Kraków, Lesser Poland Voivodeship, Poland

Date of Death: 31-Aug-1945

Profession: mathematician, university teacher

Zodiac Sign: Aries

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About Stefan Banach

  • Stefan Banach (Polish: ['st?fan 'banax] (listen); 30 March 1892 ‚Äď 31 August 1945) was a Polish mathematician who is generally considered one of the world's most important and influential 20th-century mathematicians.
  • He was the founder of modern functional analysis, and an original member of the Lw√≥w School of Mathematics.
  • His major work was the 1932 book, Th√©orie des op√©rations lin√©aires (Theory of Linear Operations), the first monograph on the general theory of functional analysis. Born in Krak√≥w, Banach attended IV Gymnasium, a secondary school, and worked on mathematics problems with his friend Witold Wilkosz.
  • After graduating in 1910, Banach moved to Lw√≥w.
  • However, during World War I Banach returned to Krak√≥w, where he befriended Hugo Steinhaus.
  • After Banach solved some mathematics problems which Steinhaus considered difficult, they published their first joint work.
  • In 1919, with several other mathematicians, Banach formed a mathematical society.
  • In 1920 he received an assistantship at the Lw√≥w Polytechnic.
  • He soon became a professor at the Polytechnic, and a member of the Polish Academy of Learning.
  • He organized the "Lw√≥w School of Mathematics".
  • Around 1929 he began writing his Th√©orie des op√©rations lin√©aires. After the outbreak of World War II, in September 1939, Lw√≥w was taken over by the Soviet Union.
  • Banach became a member of the Academy of Sciences of Ukraine and was dean of Lw√≥w University's Department of Mathematics and Physics.
  • In 1941, when the Germans took over Lw√≥w, all institutions of higher education were closed to Poles.
  • As a result, Banach was forced to earn a living as a feeder of lice at Rudolf Weigl's Institute for Study of Typhus and Virology.
  • While the job carried the risk of infection with typhus, it protected him from being sent to slave labor in Germany and from other forms of repression.
  • When the Soviets recaptured Lw√≥w in 1944, Banach reestablished the University.
  • However, because the Soviets were removing Poles from Soviet-annexed formerly-Polish territories, Banach prepared to return to Krak√≥w.
  • Before he could do so, he died in August 1945, having been diagnosed seven months earlier with lung cancer. Some of the notable mathematical concepts that bear Banach's name include Banach spaces, Banach algebras, Banach measures, the Banach‚ÄďTarski paradox, the Hahn‚ÄďBanach theorem, the Banach‚ÄďSteinhaus theorem, the Banach‚ÄďMazur game, the Banach‚ÄďAlaoglu theorem, and the Banach fixed-point theorem.

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