The preprint is devoted to the life and scientific work of the outstanding Soviet scientist in the field of applied mathematics Konstantin Semendyaev (1908–1988). As a recognized authority on carrying out massive computational work on the basis of manual counting, he was involved in the numerical calculations of the tasks of creating atomic weapons. Based on documentary materials, the significant contribution of K.A. Semendyaev to the creation of methods for numerical solution and the necessary calculations in the Atomic Project is shown.

Atomic project of the USSR, Calculation bureau of the Mathematical Institute, calculation methods, calculating machine 'Mercedes', Keldysh Institute of Applied Mathematics.

Mathematical modelling in actual problems of science and technics

Afendikova Nadezhda Gennadievna,  ,  orcid.org/0000-0002-3826-3258,  KIAM RAS

Bogdanov Andrey Nikolaevich,  ,  orcid.org/0000-0001-9541-0579,  Lomonosov State University Institute of mechanics