Ordinary Differential Equations


Strong isochronism of polynomial differential systems with a center V. V. Amel'kin, K. M. AlHaider

867 

A priori estimates and the solvability of problems with nonlinear functional boundary conditions S. A. Brykalov

874 

Types of dynamic behavior in the Hanski–Henttonen model M. Gillenberg, A. V. Osipov

882 

Dynamics of equations with feedback of impulse type S. A. Kashchenko

889 

Lower characteristic exponents of nontrivial solutions of Pfaffian systems E. N. Krupchik

899 

$L^p$properties of solutions of secondorder quasidifferential equations and the perturbation of their coefficients on sets of positive measure V. P. Serebryakov

909 

Partial Differential Equations


The problem of vibrations of a rectangular membrane under mechanical impact at one point S. I. Gaiduk

918 

The problem of determining a nonlinear coefficient in a system of partial differential equations A. M. Denisov

926 

Development of the method of spin coefficients for the integration of equations of bimetric gravitational theories I. P. Denisova

935 

The generalized Neumann problem for harmonic functions in a halfspace V. V. Karachik

942 

Numerical methods. Equations in finite differences


On a composition method for constructing iterative algorithms for solving stationary problems in mathematical physics V. N. Abrashin, N. G. Zhadaeva

948 

On the rate of convergence of a difference solution of the first boundary value problem for a fourthorder elliptic equation G. K. Berikelashvili

958 

Canonical forms of linear discrete twoparameter systems I. V. Gaishun

964 

An efficient method for solving nonlinear multidimensional Schrödinger equations F. F. Ivanauskas, R. A. Vaicekauskas

969 

Methods for the numerical modeling of equilibrium capillary surfaces V. K. Polevikov

975 

Essentially unstable solutions of difference equations in a Banach space V. E. Slyusarchuk

982 

Optimization of piecewiseuniform grids for singularly perturbed equations of reactiondiffusion type G. I. Shishkin

990 

Short Communications


On the determination of the characteristic polynomial associated with a system of ordinary differential equations A. R. Gajduk

998 

On coefficient estimates for global solutions of the Cauchy problem for semilinear partial differential systems S. V. Zhestkov

1000 

On solutions of a dynamical system with quadratic nonlinearities V. V. Tsegel'nik

1003 