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Cassius Ionescu-Tulcea (Bucareste, 14 de o … Cassius Ionescu-Tulcea (Bucareste, 14 de outubro de 1923) é um matemático estadunidense nascido na Romênia. Trabalha principalmente com teoria das probabilidades, estatística e análise matemática. Ionescu Tulcea obteve em 1946 o diploma de graduação na Universidade de Bucareste, onde lecionou a partir de 1952. A partir de 1957 estudou na Universidade Yale, onde obteve o doutorado em 1959, orientado por Einar Carl Hille, com a tese Semi-Groups of Operators.ille, com a tese Semi-Groups of Operators.
, Cassius Tocqueville Ionescu-Tulcea (* 14. … Cassius Tocqueville Ionescu-Tulcea (* 14. Oktober 1923 in Bukarest; † 6. März 2021 in Chicago) war ein rumänisch-US-amerikanischer Mathematiker, der sich mit der Wahrscheinlichkeitstheorie, Statistik und Analysis befasste. Ionescu-Tulcea erhielt 1946 sein Diplom an der Universität Bukarest, war ab 1952 Professor in Bukarest, war ab 1957 an der Yale University und wurde 1959 bei Einar Hille in Yale promoviert (Semi-Groups of Operators). Ab 1959 war er Gastprofessor in Yale und ab 1961 Associate Professor an der University of Pennsylvania. 1964 wurde er Professor an der University of Illinois at Urbana-Champaign und 1966 Professor an der Northwestern University. Er war mit der ebenfalls aus Rumänien stammenden Mathematikerin Alexandra Bellow (früher Alexandra Ionescu-Tulcea) verheiratet. Beide entwickelten in den 1960er Jahren die von John von Neumann initiierte Lifting Theory in der Funktionalanalysis mit Anwendungen in der Wahrscheinlichkeitstheorie. Der Satz von Ionescu-Tulcea, ein wichtiger Existenzsatz für zeitdiskrete Stochastische Prozesse ist nach ihm benannt (1949). Er befasste sich auch mit mathematischer Spieltheorie und mathematischen Wirtschaftswissenschaften. Er schrieb mehrere Lehrbücher und auch Bücher über Blackjack. 1957 erhielt er den Preis der Rumänischen Akademie der Wissenschaften.Zu seinen Doktoranden gehörte Robert Langlands.inen Doktoranden gehörte Robert Langlands.
, Cassius Tocqueville Ionescu Tulcea (Romani … Cassius Tocqueville Ionescu Tulcea (Romanian: Casius Ionescu-Tulcea; October 14, 1923 – March 6, 2021) was a Romanian-American mathematician, specializing in probability theory, statistics and mathematical analysis. 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 retired from there as professor emeritus. His marriage to Alexandra Ionescu Tulcea lasted from 1956 to 1969 when they divorced. During their marriage, the two mathematicians wrote a number of papers together, as well as a well-regarded research monograph on lifting theory. John von Neumann initiated lifting theory in functional analysis with applications in probability theory. The Ionescu-Tulcea theorem, an important existence theorem for time-discrete stochastic processes, is named after Cassius Ionescu Tulcea (1949). He also did research on mathematical game theory and mathematical economics. He co-authored a book on casino gambling and several textbooks on mathematics; he also wrote a 1981 book on casino dice games and gambling systems and a 1982 book on casino blackjack. In 1957 he was awarded the Prize of the Romanian Academy of Sciences. His doctoral students include George Maltese and Robert Langlands. He turned 90 in October 2013 and died in Chicago, Illinois in March 2021, at the age of 97. Illinois in March 2021, at the age of 97.
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Cassius Ionescu-Tulcea (Bucareste, 14 de o … Cassius Ionescu-Tulcea (Bucareste, 14 de outubro de 1923) é um matemático estadunidense nascido na Romênia. Trabalha principalmente com teoria das probabilidades, estatística e análise matemática. Ionescu Tulcea obteve em 1946 o diploma de graduação na Universidade de Bucareste, onde lecionou a partir de 1952. A partir de 1957 estudou na Universidade Yale, onde obteve o doutorado em 1959, orientado por Einar Carl Hille, com a tese Semi-Groups of Operators.ille, com a tese Semi-Groups of Operators.
, Cassius Tocqueville Ionescu Tulcea (Romani … Cassius Tocqueville Ionescu Tulcea (Romanian: Casius Ionescu-Tulcea; October 14, 1923 – March 6, 2021) was a Romanian-American mathematician, specializing in probability theory, statistics and mathematical analysis. In 1957 he was awarded the Prize of the Romanian Academy of Sciences. His doctoral students include George Maltese and Robert Langlands. He turned 90 in October 2013 and died in Chicago, Illinois in March 2021, at the age of 97. Illinois in March 2021, at the age of 97.
, Cassius Tocqueville Ionescu-Tulcea (* 14. … Cassius Tocqueville Ionescu-Tulcea (* 14. Oktober 1923 in Bukarest; † 6. März 2021 in Chicago) war ein rumänisch-US-amerikanischer Mathematiker, der sich mit der Wahrscheinlichkeitstheorie, Statistik und Analysis befasste. 1957 erhielt er den Preis der Rumänischen Akademie der Wissenschaften.Zu seinen Doktoranden gehörte Robert Langlands.inen Doktoranden gehörte Robert Langlands.
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