John Hamal Hubbard was born on October 6 or 7, 1945. He is an American mathematician who is currently a professor at Cornell University and the Universit� de Provence. He is well known for the mathematical contributions he made with Adrien Douady in the field of complex dynamics, including a study of the Mandelbrot set. One of their most important results is that the Mandelbrot set is connected. Hubbard graduated with a Doctorat d'�tat from Universit� de Paris-Sud in 1973 under the direction of Adrien Douady; his thesis was entitled Sur Les Sections Analytiques de La Courbe Universelle de Teichm�ller and was published by the American Mathematical Society. Hubbard has a variety of mathematical interests ranging from complex analysis to differential geometry. He has written many influential papers on complex dynamics, and he has written several books. In 2006, he has completed another: the first volume of a series devoted to Teichm�ller theory and applications to four revolutionary theorems of William Thurston. 

October 6th, 1945 in   /  Died:   Aug 21st, 2011