Claim: Mark Naimark is a Russian Mathematician who made contributions in mathematical physics through his thesis "The theory of normal operators in Hilbert space".
Evidence: Mark Aronovich Naimark (Russian: Марк Ароно́вич Наймарк) (5 December 1909 – 30 December 1978) was a Soviet mathematician who made important contributions to functional analysis and mathematical physics. 5 December 1909
Odessa, Russian Empire The theory of normal operators in Hilbert space (1936)