Editorial; pp. 3–4

Summation methods of trigonometric fourier series defined by Zak transform; pp. 5–15

Parallel and semiparallel space-like surfaces in pseudo-Euclidean spaces; pp. 16–33

Application of orthogonal transformations in the revised simplex method; pp. 34–41

General solution of a system of differential equations modelling a class of exactly-solvable potentials; pp. 42–48

Numerical stability in a model of the layered structure of thermohaline fields; pp. 49–62