John Hamal Hubbard was born on October 6 or 7, 1945 (the actual date is unknown). He is an American mathematician who is currently a professor at Cornell University and the Université de Provence. He is well known for the mathematical contributions he made with Adrien Douady in the study of the Mandelbrot set. One of their most important results is that the Mandelbrot set is connected. Wikipedia
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