Gaston Maurice Julia

Gaston Julia (right), with Gustav Herglotz

Gaston Maurice Julia (February 3, 1893 – March 19, 1978) was a French mathematician who devised the formula for the Julia set. His works were popularized by French mathematician Benoît Mandelbrot, and the Julia and Mandelbrot fractals are closely related.

Military service

Julia was born in the Algerian town of Sidi Bel Abbes, at the time governed by the French. During his youth, he had an interest in mathematics and music. His studies were interrupted at the age of 21 years old, when France became involved with World War I and he was conscripted to serve with the army. During an attack he suffered a severe injury, losing his nose. After many unsuccessful operations to remedy the situation, he resigned himself to wearing a leather strap around the area where his nose had been for the rest of his life.

Career in mathematics

Julia gained attention for his mathematical work after the war when a 199-page article he wrote was featured in the Journal de Mathématiques Pures et Appliquées, a French mathematics journal. The article, which he published during 1918 at the age of 25, titled "Mémoire sur l'itération des fonctions rationnelles" described the iteration of a rational function. The article gained immense popularity among mathematicians and the general population as a whole, and so resulted in Julia's later receiving of the Grand Prix de l'Académie des Sciences. Despite his fame, his works were mostly forgotten^{[citation needed]} until the day Benoît Mandelbrot mentioned them in his works, after which he received some national attention.

Julia died in Paris at the age of 85.

See also

Pierre Fatou

External links

• O'Connor, John J.; Robertson, Edmund F., "Gaston Julia", MacTutor History of Mathematics archive, http://www-history.mcs.st-andrews.ac.uk/Biographies/Julia.html .
• Memoir on iteration of rational functions, English translation in parts: 1/7,2/7, 3/7,4/7,5/7,6/7,7/7.
• Downloadable articles at Numdam.
• [1] Christoph Dötsch, Dynamik meromorpher Funktionen auf der Riemannschen Zahlenkugel, Diplomica GmbH Hamburg (2008)