Примери за използване на Krein на Английски и техните преводи на Български
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Krein showed a remarkable talent for mathematics at a young age.
Together with N I Akhiezer, Krein made a major contribution to this field in 1937.
Krein was dismissed from his post and the school of functional analysis closed.
The citation for the prize summarises well the contribution that Krein made to mathematics:-.
In 1941 Krein had to leave Odessa when the university was evacuated as the German armies advanced.
The fact that the family were Jewish meant that Krein grew up in an atmosphere of persecution.
At Odessa University, Potapov was a student of Livsic andhe was also taught by Livsic 's teacher Krein.
In particular Jewish lecturers at Odessa such as Krein and Livsic were dismissed from their posts.
Krein was accused of Jewish nationalism, presumably for having had too many Jewish students before the War.
Although the 1940s must have been difficult times for Krein, his mathematical research did not suffer.
Krein was accused of favouring Jews, and it was claimed that he had too many Jewish students before the War.
During the 1940s and1950s there were many unsuccessful attempts to have Krein and his students reinstated at Odessa University but all attempts failed.
Krein received many other honours, but perhaps the most prestigious award made to him was the Wolf Prize in Mathematics in 1982.
For example one of the Jewish student he ahd supervised before World War II was Livsic and he, like Krein, was not welcome back at Odessa University after the War.
Among other important work, Krein wrote eight papers on harmonic analysis and representation theory in the 1940s.
Despite the lack of an undergraduate degree,his talents were clearly visible to the mathematicians at Odessa University and, in 1926, Krein was accepted for doctoral studies under Chebotaryov.
From 1954 until his retirement Krein occupied the chair of theoretical mechanics at the Odessa Civil Engineering Institute.
Krein was not reinstated, however, but held the chair of theoretical mechanics at Odessa Marine Engineering Institute from 1944.
Kolmogorov had laid the foundations for the study of extremal problems in 1935 and Krein began to work on extremal problems for the class of differentiable periodic functions.
However, Krein never completed his undergraduate degree for he left his home in Kiev when he was 17 years old and ran away to Odessa.
Despite a life of persecution,in which he often feared arrest, Krein remained enthusiastic, friendly and kind, showing great mathematical generosity towards his students and colleagues.
Krein brought the full force of mathematical analysis to bear on problems of function theory, operator theory, probability and mathematical physics.
During the many years of very active research Krein had around him a group of very active mathematicians although this group was based more on an informal arrangement than that of a proper research group.
Krein completed his doctorate at Odessa in the following year and remained on the staff at the university building up one of the most important centres for functional analysis research in the world.
Livsic, again like Krein, did return to Odessa, teaching at the Hydrometerological Institute until 1957 and forming part of Krein's unofficial research group in Odessa.
This was also highly significant for Krein's subsequent career,for discrimination against Jews in the Ukraine was bad and, by misfortune for Krein, was particularly bad in Odessa where he lived from the age of 17.
Despite the support of those around him, Krein did have to work at a mathematical disadvantage in one sense, however, for he was not allowed to travel abroad and so was unable to attend international conferences that many mathematicians feel to be almost essential for someone so preeminent at an international level.