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Ralph S. Phillips
American mathematician (1913-1998) · United States · On the map · Academics · Died at 85
Ralph Saul Phillips was an American mathematician and academic known for his contributions to functional analysis, scattering theory, and servomechanisms. He served as a professor of mathematics at Stanford University.
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A typical day, 30 days to 24 June 2026
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About this person
He made major contributions to acoustical scattering theory in collaboration with Peter Lax, proving remarkable results on local energy decay and the connections between poles of the scattering matrix and the analytic properties of the resolvent. With Lax, he coauthored the widely referred book on scattering theory titled Scattering Theory for Automorphic Functions. Phillips received the 1997 Leroy P. Steele Prize for Lifetime Achievement.