Dmitri Fyodorovich Polyakov (6 July 1921 – 15 March 1988)Dmitri Polyakov.

Valeri Vladimirovich Polyakov (born Valeri Ivanovich Korshunov, , 27 April 1942 – 7 September 2022) was a Soviet and Russian cosmonaut.

(born 27 September 1945) a Russian theoretical physicist, formerly at the Landau Institute in Moscow and, since 1989, at Princeton University, where he is the Joseph Henry Professor of Physics Emeritus.

In physics, the Polyakov action is an action of the two-dimensional conformal field theory describing the worldsheet of a string in string theory.