Functional analysis, spectral theory of Schrodinger operators, mathematical problems of statistical mechanics, mathematical physics.
Key publications:
1. Kaplitskii V.M. A method for estimating eigenfunctions of integral operators of certain classes in unbounded domains // Izv. Math., 2011, 75(5), 933-958.
2. Kaplitskii V.M. Criteria of exponential decay for eigenfunctions of some classes of integral operators // Journal of Mathematical Sciences, 2010, 165:4, 455-462.
3. Kaplitskii V.M. Asymptotics of the distribution of eigenvalues of a selfadjont second order hyperbolic differential operator on two-dimensional torus // Sib. Math. J., 2011,51:5,830-846.
4. Kaplitskii V.M. A differential equation for Lerchs transcendent and associated symmetric operators in Hilbert space // Sb.Math, 2014, 205(8),1080-1106.
5. Kaplitskii V.M. Interpolation of nonlinear operators in weighted Lp-spaces // Sib.Math.J., 2010,51:2, 255-266.