Joseph Dennis (mathematician)
Joseph J. Dennis (c. April 11, 1905 in Gainesville, Florida – 1977) was an American mathematician and served as the chairman of the Clark College mathematics department from 1930 to 1974. He earned his Ph.D. at Northwestern University in 1944. His thesis was "Some Points in the Theory of Positive Definite J-Fractions" (related to continued fractions) co-authored with H.S. Wall. He was the eleventh African American to earn a PhD.
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