Fatou

Pierre Joseph Louis Fatou

Born: 28 Feb 1878 in Lorient, France
Died: 10 Aug 1929 in Pornichet, France

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Pierre Fatou worked in Paris. He studied the motion of a planet in a resistant medium. He also studied Taylor series and the Lebesgue integral. Fatou was interested in rational functions of a complex variable. Perhaps Fatou's most famous result is that a harmonic function u > 0 in a ball has a nontangential limit almost everywhere on the boundary.

References:

  1. Dictionary of Scientific Biography
  2. J Chazy, Pierre Fatou, Bull. astronomique 8 (1934), 379-384.
  3. D S Alexander, A history of complex dynamics : from Schrüder to Fatou and Julia (Braunschweig, 1994). 
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JOC/EFR February 1996