Richard Askey

Richard Askey
Richard Askey in 1977
Born	Richard Allen Askey (1933-06-04)June 4, 1933 St. Louis, Missouri
Died	October 9, 2019(2019-10-09) (aged 86) Madison, Wisconsin
Resting place	Forest Hill Cemetery
Alma mater	Washington University in St. Louis Harvard University Princeton University
Known for	Askey–Wilson polynomials Askey–Gasper inequality
Scientific career
Fields	Mathematics
Institutions	University of Chicago University of Wisconsin–Madison
Doctoral advisor	Salomon Bochner
Doctoral students	James A. Wilson

Richard Allen Askey (June 4, 1933 – October 9, 2019)^[1] was an American mathematician, known for his expertise in the area of special functions. The Askey–Wilson polynomials (introduced by him in 1984 together with James A. Wilson) are on the top level of the (${\displaystyle q}$-)Askey scheme, which organizes orthogonal polynomials of (${\displaystyle q}$-)hypergeometric type into a hierarchy. The Askey–Gasper inequality for Jacobi polynomials is essential in de Brange's famous proof of the Bieberbach conjecture.