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Mark Grigorievich Krein (Russian: Марк Григо́рьевич Крейн; 3 April 1907 – 17 October 1989) was a Soviet Jewish mathematician, one of the major figures of the Soviet school of functional analysis. He is known for works in operator theory (in close connection with concrete problems coming from mathematical physics), the problem of moments, classical analysis and representation theory.

He was born in Kiev, leaving home at age 17 to go to Odessa. He had a difficult academic career, not completing his first degree and constantly being troubled by anti-Semitic discrimination. His supervisor was Nikolai Chebotaryov.

He was awarded the Wolf Prize in Mathematics in 1982 (jointly with Hassler Whitney), but was not allowed to attend the ceremony.

David Milman, Mark Naimark, Izrail Glazman, Moshe Livshits and other known mathematicians were his students.

He died in Odessa.

14 January 2008, the memorial plaque of Mark Krein was unveiled on the main administration building of I.I. Mechnikov Odessa National University
See also

Tannaka–Krein duality
Krein–Milman theorem and Krein–Rutman theorem in functional analysis
Krein space
Krein's condition for the indeterminacy of the problem of moments

External links

O'Connor, John J.; Robertson, Edmund F., "Mark Krein", MacTutor History of Mathematics archive, University of St Andrews.
Mark Krein at the Mathematics Genealogy Project
INTERNATIONAL CONFERENCE Modern Analysis and Applications (MAA 2007). Dedicated to the centenary of Mark Krein


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