Morris MardenMorris Marden was an American mathematician.BiographyHe was born on 12 February 1905 in East Boston, United States. He was the seventh child of Abram and Fannie B. Marden.He died in 1991.EducationHe completed his PhD dissertation on the Location of the Roots of the Jacobian of Two Binary Forms and of the Derivative of a Rational Function under the supervision of Joseph L. Walsh.CareerHe is known for the Marden's theorem, which was proven by Jörg Siebeck.