Mstislav Keldysh
Mstislav Vsevolodovich Keldysh (Мстисла́в Все́володович Ке́лдыш {OldStyleDate|10 February|1911|28 January}, Riga – 24 June 1978, Moscow) was a Soviet scientist in the field of mathematics and mechanics, academician of the USSR Academy of Sciences (1946),