Geodesic

Volume 25 (1989) no. 3

Sommaire

On the theory of necessary conditions for optimality with delay and a derivative of the control
p. 371-379
Discrete-group analysis of ordinary differential equations
p. 379-387
Partial localization of limit sets and the asymptotic stability of nonautonomous equations. I
p. 388-400
Spectral analysis of differential operators with periodic matrix coefficients
p. 400-409
Expansions in residues of the solution of a spectral problem for a system of ordinary differential equations
p. 409-423
Necessary conditions for optimality in nonsmooth control problems with nonfixed time
p. 424-434
Relaxation oscillations in a system of Duffing type
p. 435-446
Application of the method of Lyapunov functions in the problem of Poisson stability
p. 446-452
On the asymptotic behavior of the solution of a singularly perturbed parabolic problem in the two-dimensional case
p. 453-461
Partial symmetries and integrable multidimensional differential equations
p. 461-465
A first-order partial differential equation with an integral coefficient
p. 465-477
Smoothness of parabolic Pagni potentials. I
p. 477-490
Stabilization of solutions of the first mixed problem for a higher-order quasilinear parabolic equation
p. 490-498
A method for studying regular singularities of partial differential equations
p. 499-505
Pseudodifferential equations in functional superanalysis. II.~The Feynman--Kac formula
p. 505-514
Auxiliary exponents
p. 515-517
The Dirichlet problem for a multidimensional elliptic system with variable coefficients
p. 517-520
A formula for periodic solutions of a linear nonhomogeneous differential system with a Jordan cell
p. 521-523
Symmetrization of an operator of a boundary value problem for a hyperbolic equation
p. 523-525
Asymptotic properties of the solutions of differential equations with unbounded damping
p. 525-527
On the solution of singularly perturbed equations on a large interval of the independent variable
p. 527-529
Increasing the smoothness of solutions of second-order degenerate elliptic equations
p. 529-531
A boundary value problem for a system of third-order equations of composite type
p. 531-533
On some classes of integral equations solvable in closed form
p. 533-534
A class of third-order equations with an irrational right-hand side without moving critical points
p. 535-537
A Bitsadze-Samarski{\v\i} problem
p. 537-540
Limit cycles of a dynamical system that models the functioning of a laser
p. 540-542
Exponents of regular Lappo--Danilevski{\v\i} systems
p. 543-545
Letter to the editors: ``The index of the Bitsadze--Samarski{\v\i} problem for harmonic functions'' [Differentsial'nye Uravneniya \textbf{24} (1988), no.~1, 105--110; MR0930160]