Geodesic

Volume 27 (1991) no. 12

Sommaire

Solvability of a nonlinear boundary value problem in a fixed set of functions
p. 2027-2033
Criteria for the Bessel property and the Riesz basis property of systems of root functions of differential operators. I
p. 2033-2044
On the existence of limit cycles of the second kind of multidimensional phase synchronization systems
p. 2044-2049
Boundaries of a set of characteristic exponents of linear differential systems with higher-order perturbations
p. 2050-2053
Construction of dynamical systems on manifolds
p. 2053-2058
Existence theorems for solutions of differential inclusions with a lower semicontinuous right-hand side on a locally compact set
p. 2058-2065
Properties of solutions of generalized differential equations of approximation type in $\mathbf R^n$
p. 2065-2077
Structural stability of a periodic system of differential equations
p. 2077-2081
First-order canonical elliptic systems
p. 2082-2094
A mixed problem with an integral condition for parabolic equations with a Bessel operator
p. 2094-2098
A mixed problem for an equation of plate-oscillation type that is degenerate at a finite moment of time
p. 2099-2106
Qualitative properties of the Riemann function
p. 2106-2120
Boundary value problems for degenerate pseudoparabolic and pseudohyperbolic systems
p. 2120-2124
On the uniqueness of the simultaneous determination of the coefficient in a quasilinear parabolic equation and the coefficient in the boundary condition
p. 2124-2128
Separability of an operator of mixed type and the completeness of its root vectors
p. 2128-2137
Boundary value problems for degenerate systems of equations
p. 2138-2147
On the method of $R$-functions and the method of integral equations in the solution of problems in mathematical physics
p. 2147-2151
A nonlocal boundary value problem in a layer: the influence of the parameters on the properties of the solutions
p. 2151-2161
Spectral properties of the differential operator $\frac d{dt}-A_0$ with an unbounded operator $A_0$
p. 2162-2164
Abstract formulas for regularized traces of elliptic smooth differential operators defined on compact manifolds
p. 2164-2166
On the number of cycles of some differential equations on a two-dimensional torus
p. 2167-2169
On the theory of complete controllability of systems with aftereffect involving constraints on the control
p. 2169-2170
Regularization of variational inequalities with perturbed nonmonotone and discontinuous operators
p. 2171-2172
Uniqueness of the solution of an exterior inverse potential problem in convex domains
p. 2172-2174
On the existence of generalized optimal controls in systems with delay in the control
p. 2174-2176
A generalization of the Eshukov boundary value problem
p. 2177-2178
On the first variation in the theory of optimal control of systems with distributed parameters
p. 2179-2181
Calculation of the Kronecker--Poincar\'e index of algebraic curves with respect to algebraic fields on the plane
p. 2181-2183
On the Muckenhoupt condition and the V.\,A.~Il'in condition in the question of the basis property of systems of exponentials
p. 2183-2185
Viktor Aleksandrovich Pliss (on the occasion of his sixtieth birthday)
p. 2186-2189
Letter to the editors: ``Methods for constructing positional controls, and a feasible maximum principle'' [Differentsial'nye Uravneniya \textbf{26} (1990), no. 11, 1914--1924; MR1092085]
Letter to the editors: ``Some differential-topological problems in control theory''