on the irreducible representations of C*-algebras in terms of compact operators on a Hilbert space. Naimark equivalence of two group representations on a Banach space Selected publications Unitary representations of the classical group (with I. M. Gelfand, 1950) Linear Differential operators, 1954 Normed Rings, 1956 Linear Representations of the Lorentz Group, 1958 Theory of Group Representations, 1976 (all the above books were written in Russian) See also Naimark's problem Naimark's dilation theorem GNS theorem Gelfand–Naimark theorem Naimark equivalence References External links Naimark, Mark A. Naimark, Mark A. Naimark, Mark А. Naimark, Mark А. Functional analysts Group theorists Odesa Jews Burials at Kuntsevo Cemetery