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Daniel Quillen
American mathematician (1940–2011).
Born June 22nd, 1940 in Orange. [ref]
Died April 30th, 2011 at 70 years old in San Francisco (Alzheimer's disease).
Occupations
mathematician, topologist, university teacher
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The great thing about getting older is that you don't lose all the other ages you've been. Madeleine L'Engle