Cassius Ionescu-Tulcea

Cassius Tocqueville Ionescu Tulcea (; October 14, 1923 – March 6, 2021) was a Romanian-American mathematician, specializing in probability theory, statistics and mathematical analysis.

Life and career Ionescu Tulcea was born in October 1923 in Bucharest. He received his diploma from the University of Bucharest in 1946; there he was an assistant professor from 1946 to 1950, a lecturer from 1950 to 1951, and an associate professor from 1952 to 1957. Additionally, from 1949 to 1957 he was a researcher at the Institute of Mathematics of the Romanian Academy. In 1957 he moved to the United States with his wife Alexandra Ionescu Tulcea (née Bagdasar), who had been his student. From 1957 to 1961 he worked as a research associate and visiting lecturer at Yale University. He received his doctorate from Yale in 1959 under the supervision of Einar Hille with thesis Semi-groups of Operators. Cassius Ionescu Tulcea was from 1959 to 1961 a visiting professor at Yale University, from 1961 to 1964 an associate professor at the University of Pennsylvania, and from 1964 to 1966 a full professor at the University of Illinois at Urbana–Champaign. He became in 1966 a full professor at Northwestern University and died in Chicago, Illinois, in March 2021, at the age of 97.

Selected publications A book on casino blackjack, Van Nostrand 1982 with Virginia L. Graham: A book on casino gambling: written by a mathematician and a computer expert, 1976, 2nd edition, Van Nostrand 1978 A book on casino craps, other dice games & gambling systems, Van Nostrand 1981 with Robert G. Bartle: Calculus, Scott Foresman 1968 with Robert G. Bartle: An introduction to Calculus, Scott Foresman 1968 with Robert G. Bartle: Honors Calculus, Scott Foresman 1970 with William W. Fairchild: Topology, Philadelphia: Saunders 1971 with William W. Fairchild: Sets, Saunders 1970 with Alexandra Ionescu Tulcea: Topics in the Theory of Lifting, Ergebnisse der Mathematik und ihrer Grenzgebiete, Band 48, Springer-Verlag New York Inc., New York 1969,.