Ruslan Smelyansky (Russian: Русла́н Леони́дович Смеля́нский) (born 1950) is a Russian mathematician, Dr. Sc., Professor, a professor at the Faculty of Computer Science at the Moscow State University, Corresponding Member of the Russian Academy of Sciences.^[1]

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He defended the thesis «Analysis of the performance of multiprocessor systems based on the invariant behavior of programs» for the degree of Doctor of Physical and Mathematical Sciences (1990).^[2] He is the author of six books.^[3][4]