Gyula Farkas

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Gyula Farkas

Gyula Farkas ([ ˈɟula fɒrkɒʃ ], also Julius Farkas) (born March 28, 1847 in Sárosd , † December 27, 1930 in Pestszentlőrinc ) was a Hungarian physicist and mathematician .

After he was Farkas' lemma named a key sentence in the duality theory of linear programming . Farkas' lemma is also called the "principle of simple inequalities".

biography

Farkas first attended the Benedictine grammar school in Győr (Raab), and went to Pest with the intention of studying music and law. He quickly disliked studying law and (according to contemporary witnesses) lacked the talent for studying music. Farkas worked as a private lecturer in Budapest for a while before returning to university to study physics and chemistry.

After a job as a teacher at the grammar school in Székesfehérvár (Stuhlweissenburg) he taught mathematics and physics to the children of Géza Batthyány , Count von Polgárdi , from 1874 . He finally had time to do research in mathematics and physics, including in a physics laboratory set up for teaching purposes. He was also given the opportunity to do research trips abroad.

Farka's impressive list of publications in Comptes Rendus , the reports of the Paris Académie des sciences , brought him a call to the University of Budapest as a lecturer in function theory in 1880 . In his function-theoretical investigations, his contributions to iteration theory should be mentioned in particular . In 1884 he gave conditions for the solvability of Schröder's functional equation . In January 1887 he was appointed (extraordinary) professor at the University of Kolozsvár (today Cluj-Napoca ), the following year he became a full professor there. The Hungarian Academy of Sciences elected him on May 6, 1898 as a member. During his career at the University of Kolozsvár, Farkas worked temporarily as dean and later as rector .

In 1915, Farkas retired due to his badly deteriorating eyesight. After the death of his first wife, Farkas remarried. But his second wife also died before 1915, and so Farkas lived alone for the remaining 15 years of his retirement until he moved in with relatives a few months before his death. Farkas died on December 27, 1930 in Pestszentlőrinc .

Mathematical publications

Farkas' most important works can be found in the reports of the Science Academy of Paris (1878-1884)

  • in the "Archive of Mathematics and Physics"
  • in the "Journal des Mathematiques"

His individually published works are

  • "The diatonic major scale scientifically founded", Pest, 1870
  • "Természettan elemei" (Elements of Physics), Székesfehérvár, 1872

swell

  • B. Szénássy, History of Mathematics in Hungary until the 20th Century (Berlin-Heidelberg-New York, 1992).
  • L. Filep, Life and work of Gyula Farkas (1847-1930), Boll. Storia Sci. Mat. 3 (1): 137-160 (1983).
  • Daniel S. Alexander: A history of complex dynamics: from Schröder to Fatou and Julia. (Aspects of Mathematics), Vieweg, Braunschweig 1994, ISBN 3-528-06520-6 . Section 2.6 discusses Farkas' contribution.

Web links

Individual evidence

  1. ↑ Jules Farkas: Sur les fonctions itératives , Journal de Mathématiques Pures et Appliquées ( Series 3), Volume 10, pp. 101-108
personal data
SURNAME Farkas, Gyula
ALTERNATIVE NAMES Farkas, Julius
BRIEF DESCRIPTION Hungarian physicist and mathematician
DATE OF BIRTH March 28, 1847
PLACE OF BIRTH Sárosd
DATE OF DEATH December 27, 1930
Place of death Pestszentlőrinc