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1999, Volume 35, Number 7  

Ordinary Differential Equations
Strong isochronism of polynomial differential systems with a center
V. V. Amel'kin, K. M. Al-Haider 		867–873
A priori estimates and the solvability of problems with nonlinear functional boundary conditions
S. A. Brykalov 		874–881
Types of dynamic behavior in the Hanski–Henttonen model
M. Gillenberg, A. V. Osipov 		882–888
Dynamics of equations with feedback of impulse type
S. A. Kashchenko 		889–898
Lower characteristic exponents of nontrivial solutions of Pfaffian systems
E. N. Krupchik 		899–908
$L^p$-properties of solutions of second-order quasidifferential equations and the perturbation of their coefficients on sets of positive measure
V. P. Serebryakov 		909–917

Partial Differential Equations
The problem of vibrations of a rectangular membrane under mechanical impact at one point
S. I. Gaiduk 		918–925
The problem of determining a nonlinear coefficient in a system of partial differential equations
A. M. Denisov 		926–934
Development of the method of spin coefficients for the integration of equations of bimetric gravitational theories
I. P. Denisova 		935–941
The generalized Neumann problem for harmonic functions in a half-space
V. V. Karachik 		942–947

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 		948–957
On the rate of convergence of a difference solution of the first boundary value problem for a fourth-order elliptic equation
G. K. Berikelashvili 		958–963
Canonical forms of linear discrete two-parameter systems
I. V. Gaishun 		964–968
An efficient method for solving nonlinear multidimensional Schrödinger equations
F. F. Ivanauskas, R. A. Vaicekauskas 		969–974
Methods for the numerical modeling of equilibrium capillary surfaces
V. K. Polevikov 		975–981
Essentially unstable solutions of difference equations in a Banach space
V. E. Slyusarchuk 		982–989
Optimization of piecewise-uniform grids for singularly perturbed equations of reaction-diffusion type
G. I. Shishkin 		990–997

Short Communications
On the determination of the characteristic polynomial associated with a system of ordinary differential equations
A. R. Gajduk 		998–999
On coefficient estimates for global solutions of the Cauchy problem for semilinear partial differential systems
S. V. Zhestkov 		1000–1002
On solutions of a dynamical system with quadratic nonlinearities
V. V. Tsegel'nik 		1003–1004
 
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