Geodesic

Sommaire du Fascicule no. 1

Analytic functions that are generalized in the sense of I.\,N.~Vekua, and boundary value problems in fractional spaces
p. 3-11
An estimate for second-order partial differential equations and its application
p. 12-21
Some boundary value problems with displacement for a certain equation of mixed parabolic-hyperbolic type
p. 22-29
Strictly hyperbolic diffraction problems
p. 30-38
Uniqueness of boundary value problems for a second-order degenerate elliptic equation
p. 39-49
A boundary value problem for a hyperbolic equation that degenerates inside the domain
p. 50-65
On the theory of linear boundary value problems for a second order equation of mixed hyperbolic-parabolic type
p. 66-73
Uniqueness of the solution of exterior inverse problems of potential theory
p. 74-79
A multidimensional analogue of the Darboux problem for degenerate hyperbolic equations
p. 80-93
The problem of determining the coefficients of a linear hyperbolic system
p. 94-103
On the Noether theory of operators. Wiener imbeddings of $B$-algebras
p. 104-115
Existence of a quasisolution for systems of parabolic type
p. 116-122
The characteristic problem for second-order hyperbolic systems with constant coefficients
p. 123-135
The Dirichlet problem for a generalized Lavrent'ev--Bicadze equation in a rectangular domain
p. 136-139
The inverse problem for the potential of laminated media in the two-dimensional case
p. 140-147
Elliptic boundary value problems for operators of a special form
p. 148-159
Analytic continuation of the sum of an axially symmetric Laplace series as a function of the arithmetic properties of the coefficients
p. 160-166
On the problem of the perturbation of waves on a coastal sandbar
p. 167-169
A boundary value problem with displacement for the equation $\operatorname{sign}y|y|^mu_{xx}+u_{yy}=0$ in an unbounded domain
p. 170-173
Some systems of first-order partial differential equations and the corresponding generalized Euler-Poisson-Darboux equations
p. 174-176
The regularization of a system of complete singular integral equations
p. 177-180
The Darboux problem for a certain second order loaded integro-differential equation
p. 181-184
A nonlocal problem for an equation of mixed parabolic-hyperbolic type
p. 185-186

Sommaire du Fascicule no. 2

A two-point boundary value problem with a nonsummable singularity
p. 195-200
Separatrices of saddle periodic solutions of Duffing's equation
p. 201-211
Estimates of the solutions of nonlinear differential equations in a phase space, and the stability of invariant sets
p. 212-222
The trajectories of quasihomogeneous systems of differential equations
p. 223-231
Monotone differential equations.~III
p. 232-244
Phase diagrams that determine Morse--Smale systems without periodic trajectories on spheres
p. 245-254
The problem of the accumulation of perturbations for linear differential equations with retarded argument
p. 255-267
Justification of a method for measuring the thermophysical characteristics of rigid bodies
p. 268-273
The solvability of a variational problem for a certain class of functions in an axially symmetric domain
p. 274-280
A boundary value problem with displacement for an equation of the second kind
p. 281-290
Fundamental solutions of parabolic systems with discontinuous coefficients, and their applications to boundary value problems.~III
p. 291-303
Equations of mixed type with two lines of degeneracy in unbounded domains. I.~Imbedding theorem. Uniqueness theorem
p. 304-317
Estimates of the derivatives of associated Legendre functions and related functions in the $L_p$ metrics, $1$, and in~$C$
p. 318-327
The P\'olya--Mammana factorization of a linear matrix difference operator.~I
p. 328-337
A method for the improvement of attainable controls in discrete systems
p. 338-344
Dynamic programming for problems with time-dependent parameters
p. 345-354
Solutions in generalized functions of differential equations with a countable set of deviations of the argument
p. 355-358
On the theory of Green matrices
p. 359-360
On correct solvability for certain parabolic boundary problems without initial conditions
p. 361-363
The exact solution of a difference Cauchy problem
p. 364-365
Estimates for a class of pseudodifferential operators
p. 366-368
On a two-sided process of Runge--Kutta type with three double node
p. 369-370
On the question of the averaging principle
p. 371-373
On solutions for a certain class of systems of differential equations
p. 374-375
The partial averaging method in terminal control problems
p. 376-379
A solution for the problem of center and focus for certain systems of non-linear oscillations
p. 380-382
On one class of non-selfadjoint differential operators with a discrete spectrum
p. 383-384

Sommaire du Fascicule no. 3

Uniform approximations to the solutions of certain singularly perturbed nonlinear equations
p. 395-406
A necessary condition for the system of eigen- and associated functions of an ordinary differential operator to be a basis in $L_2(0,1)$
p. 407-417
Correctness of an optimal control problem with a variable right end and an integral quadratic efficiency criterion
p. 418-424
The complex centers and foci of a second order differential equation
p. 425-434
The spectrum of a degenerate boundary value problem
p. 435-441
Stability in the large of the zero solution of a second order autonomous system
p. 442-450
Controllability of general differential systems
p. 451-459
A problem on the construction of comparison functions in the theory of the stability of motion
p. 460-466
Almost reducible systems with quasiperiodic coefficients
p. 467-473
Normal solvability of the generalized Dirichlet problem for a certain class of nonelliptic equations
p. 474-481
A second order degenerate elliptic equation in Hilbert space
p. 482-491
An application of the contour integral method to the solution of the Cauchy problem for certain higher order parabolic systems with variable coefficients
p. 492-498
The absolute convergence of Fourier series in generalized Nikol'ski{\v\i} classes
p. 499-503
A problem with a contact discontinuity for a system of three quasilinear equations
p. 504-511
A nonlinear integro-differential system of transport equations
p. 512-521
On the approximate solution of certain singular integral equations with shift
p. 522-526
The construction of an asymptotic solution of a system of linear integro-differential equations of rational rank
p. 527-539
Reducible completely integrable systems
p. 540-542
On the question of the stability of the solutions of second order systems in critical cases
p. 543-545
The semiperiodic Dirichlet problem for a class of equations of mixed type
p. 546-547
The solvability of boundary value problems on small intervals
p. 548-550
A third order linear differential equation
p. 551-553
Correctness of a boundary problem for differential-operator equations in a Banach space
p. 554-555
Regularization of linear differential equations with constant operators in the degenerate case
p. 556-560
Generalized solvability of a certain boundary value problem for the wave equation
p. 561-564
Konstantin Sergeevi{\v{c}} Sibirski{\v\i} (on the occasion of his fiftieth birthday)
p. 565-570

Sommaire du Fascicule no. 4

Domains of controllability in the plane
p. 579-593
The construction of canonical equations of motion of mechanical systems
p. 594-600
The asymptotic behavior of the solution of a certain singularly perturbed Cauchy problem that arises in optimal control theory
p. 601-612
The boundedness of the solutions of a certain multidimensional system in the critical case of one zero root and two pure imaginary roots.~I
p. 613-623
On the theory of the complete observability of systems with lag
p. 624-633
The genericity of almost reducible systems with almost periodic coefficients
p. 634-636
The construction of coefficient tests for the $G$-orthogonal reducibility and $G$-spherical compatibility of systems of linear differential equations
p. 637-645
Almost reducible three-dimensional linear systems with quasiperiodic coefficients
p. 646-651
An example of nonsimple vanishing of a periodic solution
p. 652-660
On the solution of the problem of the diffraction of a plane electromagnetic wave by a spheroid
p. 661-664
Equations of mixed type with two lines of degeneracy in unbounded domains. II.~Existence of a strong solution
p. 665-679
The solution of nonlinear equations with monotone transformations
p. 680-689
A nonlinear boundary value problem for an infinite system of integro-differential equations of parabolic type in a noncylindrical domain
p. 690-698
Controllable Volterra integro-differential operators
p. 699-705
On the Noether theory of operators. One-dimensional singular integral operators of general form
p. 706-718
Estimates of derivatives with respect to the parameter of the resolvent of a second order differential operator
p. 719-723
Properties of the eigenvalues and eigenfunctions of a general nonselfadjoint elliptic boundary value problem in an unbounded domain
p. 724-727
Representation of the solutions of completely integrable linear systems
p. 728-730
The Dirichlet problem for a system of equations of composite type
p. 731-733
On solutions of a class of singular differential equations
p. 734-735
The Cauchy problem for operators that decompose into Euler--Poisson--Darboux factors
p. 736-739
On a differential equation of diffraction theory
p. 740-742
Uniqueness of the solution of the Dirichlet problem for a second order elliptic equation in a domain with an infinite boundary
p. 743-746
The normal form of some differential equations
p. 747-749
A sufficiency criterion for $L^p$-stability in the first approximation
p. 750-752
Continual equivalence of dynamical systems on the sphere
p. 753-754
Anatoli{\v\i} Iosifovi{\v{c}} Jablonski{\v\i} (on the occasion of his fiftieth birthday)
p. 755-758
О~семинаре по качественной теории дифференциальных уравнений в~Московском университете
p. 759-762

Sommaire du Fascicule no. 5

Functional-differential equations
p. 771-797
Strictly positive periodic solutions of a nonlinear ordinary differential equation
p. 798-806
Classification of polynomial systems with respect to birational transformations.~I
p. 807-816
The existence of limit cycles of the equation $(1+x)yy'=-P_4(x)-P_2(x)y+\delta y^2$ in a singular case
p. 817-823
The growth of meromorphic solutions of second order differential equations
p. 824-829
Simple cycles in relay-sampled data systems
p. 830-834
Concomitants of a system with quadratic nonlinearities
p. 835-842
The boundedness of the solutions of a certain multidimensional system in the critical case of one zero root and two pure imaginary roots.~II
p. 843-852
The behavior of the solutions in the case where the transformation of the argument depends on the solution
p. 853-858
Boundary value problems for differential equations with operator coefficients that depend on a parameter. II. Solvability and properties of solutions
p. 859-870
The uniqueness of the expansions in eigenfunctions of the Schr\"odinger operator
p. 871-877
Unboundedness of the solutions and a comparison theorem of Sturm type for higher order parabolic systems on the plane
p. 878-884
Fundamental solutions of parabolic systems with discontinuous coefficients, and their applications to boundary value problems.~IV
p. 885-899
An approach to the solution of ill-posed problems
p. 900-904
Periodic solutions of linear completely integrable systems
p. 905-907
High order optimality conditions in a class of problems with constraints on the ends of the trajectories
p. 908-911
On solutions of a singular Cauchy problem
p. 912-914
Formulas for the mutual expansion of cylindrical and spheroidal wave functions
p. 915-918
The dependence on the parameter of the structure of the solutions on a toroidal invariant surface
p. 919-921
Polynomial solutions of algebraic differential equations
p. 922-925
Asymptotic behavior of the solutions of linear difference equations with constant coefficients
p. 926-928
Necessary and sufficient conditions for the solvability of a multipoint boundary value problem for a system of first order ordinary differential equations
p. 929-931
Eigenvalues of certain integral operators
p. 932-934
Isolated periodic solutions of certain differential equations
p. 935-937
A criterion for the harmonicity of polynomials
p. 938-939
Some properties of the solutions of linear differential equations with asymptotically almost periodic coefficients
p. 940-942
On the problem of the homotopy classification of elliptic systems with eight variables
p. 943-946
Vladimir Aleksandrovi{\v{c}} Il'in (on the occasion of his fiftieth birthday)
p. 947-954

Sommaire du Fascicule no. 6

Quasilinear equations with a small parameter multiplying the derivative and with a nonperturbed operator on the spectrum in a $B$-space
p. 963-973
A differential system with a zero root of the characteristic equation and with periodic coefficients
p. 974-993
An evasion problem with integral constraints
p. 994-1001
Traces of functions of Sobolev spaces of infinite order and the inhomogeneous Cauchy--Dirichlet problem
p. 1002-1012
Asymptotically sharp estimates for bounded solutions on the entire axis of inhomogeneous differential equations with a small parameter
p. 1013-1017
A nonclassical de la Vall\'ee Poussin problem
p. 1018-1027
Affine classification of a system with quadratic nonlinearities and not single valued canonical form
p. 1028-1033
Periodic solutions of weakly nonlinear systems with impulse action
p. 1034-1045
Quasilinear differential evasion games
p. 1046-1052
Waves in the flow of a fluid of variable density
p. 1053-1059
Formulas for the mutual re-expansion of spherical and cylindrical solutions of Maxwell equations
p. 1060-1064
Stabilization of the solution of the Cauchy problem for a hyperbolic equation
p. 1065-1075
On the absence of the localization of the expansion in the Laplace series of a function from the H\"older class $C^{1/2}$ on the sphere
p. 1076-1080
Solvability of boundary value problems for higher order operator-differential equations
p. 1081-1092
Solvability of a general boundary value problem for the Laplace equation
p. 1093-1103
Higher order quasilinear elliptic equations with continuous generalized solutions
p. 1104-1118
Analytic solutions of a class of integral equations
p. 1119-1123
A study on stability in the case of constantly acting perturbations in the ``neutral case''
p. 1124-1127
Stability of the solutions of a class of nonlinear differential equations in the case of actions of impulse type
p. 1128-1130
Bilateral Runge--Kutta approximations of high accuracy
p. 1131-1132
A system with hysteresis
p. 1133-1135
An integral comparison and the nonoscillatory property of solutions of second order linear systems
p. 1136-1139
Almost periodic solutions of evolution equations
p. 1140-1143
Il'ja Nestorovi{\v{c}} Vekua
p. 1144-1146

Sommaire du Fascicule no. 7

On the question of conflicting control systems in a metric space
p. 1155-1162
A class of linear functional-differential equations
p. 1163-1172
Darboux integrals in the case of a focus
p. 1173-1178
The connectedness of a set of solutions of a functional-differential equation
p. 1179-1185
Oscillation of the solutions of $n$th order differential equations with retarded argument
p. 1186-1191
Monotone differential equations.~IV
p. 1192-1202
A characteristic property of dynamical systems with a discrete spectrum
p. 1203-1207
The composition of a differential equation from its solutions, and the proof of a lemma of L.\,S.~Pontrjagin
p. 1208-1214
Difference schemes for parabolic equations with a nonlinear degeneracy.~II
p. 1215-1223
Some classes of linear and quasilinear elliptic equations with summable coefficients
p. 1224-1234
A mixed problem of Riquier type for a hyperbolic equation
p. 1235-1244
A class of inverse problems for multidimensional quasilinear parabolic equations
p. 1245-1254
The construction of particular solutions of resonance differential equations
p. 1255-1261
The property of being an unconditional basis of systems of eigenfunctions of certain quasilinear operator equations
p. 1262-1271
Estimates of the Green tensors of elasticity theory
p. 1272-1284
On the Noether theory of operators. One-dimensional singular integral operators of classical type
p. 1285-1295
Asymptotic behavior of the Green function of a pseudodifferential parabolic equation
p. 1296-1301
Estimates of the derivatives of the solutions of linear equations of elliptic type on $E^n$ and related weighted imbedding theorems.~I
p. 1302-1312
Error estimation for linearization
p. 1313-1316
Necessary and sufficient conditions for the stability in the large of the zero solution of a second order autonomous system
p. 1317-1320
A problem for equations of mixed type with a closed line of degeneracy
p. 1321-1323
Pointwise controllability of systems with after effect
p. 1324-1327
Magnitudes of deviations for the transcendental solution of a differential equation
p. 1328-1331
Hyperplanes of symmetry of a system of differential equations
p. 1332-1334
A boundary value problem for a differential equation with a parameter
p. 1335-1337
Рецензия на монографию В.\,Л.~Рвачева и А.\,П.~Слесаренко «Алгебра логики и интегральные преобразования в~краевых задачах»

Sommaire du Fascicule no. 8

On the theory of functional-differential equations
p. 1347-1361
Stability and topological classification of invariant sets
p. 1362-1370
On the theory of duality in control systems
p. 1371-1380
Averaging of boundary value problems in terminal optimal control problems
p. 1381-1387
Averaging of quasilinear systems with several fast variables
p. 1388-1399
The equivalence of systems of differential equations with reducing contraction
p. 1400-1413
Asymptotic solution of certain optimal control problems with lags
p. 1414-1423
A mixed problem for a second order degenerate hyperbolic equation with two variables
p. 1424-1438
Solution of a boundary value problem for the Helmholtz equation in a layered space with a spherical inclusion
p. 1439-1447
On the estimation of the classical solution of a mixed problem for a hyperbolic equation
p. 1448-1454
Estimates of the derivatives of the solutions of linear equations of elliptic type on $E^n$ and related weighted imbedding theorems.~II
p. 1455-1464
Some properties of the set of solutions of a Volterra--Hammerstein integral inclusion
p. 1465-1472
Singular numbers of integral operators
p. 1473-1477
Difference schemes for quasilinear nonstationary problems.~II
p. 1478-1486
A difference method with rectification of the fronts for the solution of nonlinear problems of Stefan type
p. 1487-1489
Asymptotic stability in nonlinear systems
p. 1490-1493
The Volterra model with a weakly linear hereditary characteristic
p. 1494-1496
A system of integro-differential equations with a small parameter multiplying the derivative of conditionally stable type
p. 1497-1501
Stability of a dynamical system with a cylindrical phase space
p. 1502-1503
The Grobman--Hartman theorem for extensions of dynamical systems
p. 1504-1506
Coercive solvability of abstract parabolic equations with a constant operator
p. 1507-1510
Potential functions of the field of radiation of an electric quadrupole in cylindrical coordinates
p. 1511-1513
A method for lowering the order of linear differential equations
p. 1514-1515
An isoperimetric problem
p. 1516-1519
Combination of {\v C}aplygin and spline-collocation methods for the solution of ordinary differential equations
p. 1520-1521
The calculation of eigenvalues and -vectors of linear operators on the basis of the theory of perturbations
p. 1522-1525
On the question of absolute exponential stability of linear differential equations of lagging type in a Banach space
p. 1526-1528

Sommaire du Fascicule no. 9

Switching lines on the plane
p. 1539-1551
A differential deviation game for systems with distributed parameters
p. 1552-1557
The determination of periodic solutions of nonlinear systems by the averaging method
p. 1558-1565
A small parameter in a differential evasion game
p. 1566-1575
Lower bound for the minimal exponent of a linear system
p. 1576-1588
Conditions for two centers for a quadratic differential system
p. 1589-1593
Conditions for a center for the equation $yy'=\sum_{i=0}^3 p_i(x)y^i$
p. 1594-1600
Uniform asymptotic stability of a differential system with respect to the first nonlinear approximation of order $\mu $
p. 1601-1605
Stability of the zero solution of Pfaffian systems in terms of generalized characteristic vectors
p. 1606-1612
The method of lines in nonlinear heat problems
p. 1613-1623
The finiteness of the Dirichlet integral for a class of functions
p. 1624-1631
Some problems of mechanics with discontinuous boundary conditions and a nonsmooth boundary
p. 1632-1637
The method of matching asymptotic expansions for the equation $\varepsilon\Delta u-au_z=f$ in a parallelepiped
p. 1638-1648
The maximum principle in the moment theory of elasticity
p. 1649-1658
The global solution of weakly nonlinear hyperbolic equations in a Hilbert space
p. 1659-1669
The stability of control systems
p. 1670-1677
The Noether theory for integral equations of the third kind
p. 1678-1686
The dependence of the control set on the parameter
p. 1687-1688
Asymptotic stability in nonlinear systems, and the critical case of $2m$ purely imaginary roots in the theory of the stability of motion
p. 1689-1691
The stability of the solution of the spectral problem for a multi-group diffusion approximation of the transport equation
p. 1692-1695
A comparison of the properties of the solutions of a quasi-triangular and a quasi-diagonal system
p. 1696-1697
An investigation of the oscillations of beams of variable cross section
p. 1698-1700
The stable solvability of boundary value problems for autonomous differential equations with deviating argument
p. 1701-1702
Dynamic equivalence near invariant manifolds
p. 1703-1705
The problem of the conjugation of nonstationary linear differential equations with a parameter
p. 1706-1709
Distribution of Ljapunov exponents in linear systems with periodic coefficients that are nearly constant in the mean
p. 1710-1714
A remark on the controllability of a linear periodic system
p. 1715-1717
Some theorems on the stability of degree~$n$ with respect to the matrix~$\Phi (t)$
p. 1718-1720

Sommaire du Fascicule no. 10

Classification of polynomial systems with respect to birational transformations.~II
p. 1731-1738
Linear extensions that satisfy the Perron condition.~I
p. 1739-1751
Generalization of the criterion for almost reducibility
p. 1752-1759
A second inverse problem of the qualitative theory of differential equations
p. 1760-1764
Differential equations that have Darboux integrals
p. 1765-1774
Some remarks on the solutions of Kneser's problem
p. 1775-1783
Operational calculus of rational differential operators
p. 1784-1790
On the theory of $\varepsilon $-controllability of linear systems with lag
p. 1791-1795
Some properties of minimal invariant sets of control systems
p. 1796-1805
A boundary value problem for a linear system with a small parameter multiplying the derivative
p. 1806-1813
The problem of center in the case of a complex stationary point that is separable into simple saddle points
p. 1814-1823
An integral representation of the solutions of a generalized biaxially symmetric Helmholtz equation and formulas for its inversion
p. 1824-1831
Elementary solutions and integral representations for a class of differential equations with $n$ singular hyperplanes
p. 1832-1843
Expansion of the solutions of nonlinear equations into double series
p. 1844-1850
Asymptotic behavior of the solution of a boundary value problem for a fourth-order parabolic equation
p. 1851-1862
Stability and stabilization of the solutions of the coagulation equation
p. 1863-1874
Averaging in systems of integro-differential equations of special type
p. 1875-1880
The P\'olya--Mammana factorization of a linear matrix difference operator.~II
p. 1881-1887
Optimization of projection methods for the solution of differential equations
p. 1888-1899
Asymptotic representation of periodic solutions of certain elliptic equations of order $2m$ in the process $m\rightarrow \infty $
p. 1900-1902
A theorem of G. J. Butler
p. 1903-1904
A boundary value problem in a class of discontinuous functions and the calculus of variations
p. 1905-1906
Serge{\v\i} L'vovi{\v{c}} Sobolev (on the occasion of his seventieth birthday)
p. 1907-1910
О~семинаре по качественной теории дифференциальных уравнений в~Московском университете
p. 1911-1914

Sommaire du Fascicule no. 11

Asymptotic properties of the solutions of linear differential equations with entire coefficients
p. 1923-1934
Solvability of a general boundary value problem as a consequence of the solvability of an elementary two-point boundary value problem
p. 1935-1940
Boundedness theorems for some second-order differential equations.~IV
p. 1941-1979
A Poincar\'e-Schur algorithm in stability theory
p. 1980-1989
Equivalence of some second-order differential operators in a space of entire functions
p. 1990-1996
The boundary of a stable invariant set of the Morse--Smale system
p. 1997-2001
A boundary value problem for degenerate ordinary differential equations of infinite order
p. 2002-2011
On the question of an exponential dichotomy on the half-line of the solutions of linear systems of differential equations
p. 2012-2018
Green functions of the Dirichlet problem for the Laplace equation in a strip and a rectangle with $N$~circular slits
p. 2019-2025
Solvability of initial-boundary value problems for a weakly nonlinear system
p. 2026-2037
The Dirichlet problem for a system of Euler--Poisson--Darboux equations in a circle with its center on the line of degeneracy and in its parts
p. 2038-2046
The asymptotic expansion of solutions of some integro-differential equations
p. 2047-2051
Perturbation of the poles of the scattering operator for a system of Maxwell equations
p. 2052-2059
Integral equations of convolution type in a family of spaces of generalized functions that is continuously dependent on a parameter
p. 2060-2064
Representation of quasi-periodic motions near the equilibrium state with the aid of convergent power series
p. 2065-2067
Bundle transport of charged particles in an electromagnetic field
p. 2068-2070
On the problem of observation of perturbed systems
p. 2071-2072
A note on Nehari's nonoscillation theorem
A conjecture in the theory of functional-differential equations
p. 2074-2075
Movable singularities of a second-order system
p. 2076-2078
The asymptotic estimate of $0$-solutions of a multidimensional system
p. 2079-2081
The correctness of a boundary value problem for a system of linear differential equations
p. 2082-2085
The asymptotic stability of the equilibrium state of a family of systems of linear differential equations
p. 2086-2088
Well-posedness of the Cauchy problem for a class of partial integro-differential equations
p. 2089-2092
Ein Problem der optimalen Regelung eines station\"aren Systems in der Klasse der unstetigen Funktionen
p. 2093-2095
On the scattering theory for a system of differential equations with a smooth, compactly supported potential
p. 2096-2098
The asymptotic equivalence of Pfaffian systems
p. 2099-2103
К~сведению читателей

Sommaire du Fascicule no. 12

The development of the theory of ordinary differential equations in Belorussia
p. 2115-2122
An important contribution to the development of differential equations and their application
p. 2123-2130
Single-parameter families of solutions of Painlev\'e equations
p. 2131-2135
The stability of characteristic vectors of the solutions of linear homogeneous Pfaffian systems
p. 2136-2146
Existence of solutions with prescribed properties in systems of differential equations in the complex domain
p. 2147-2152
The stability of a perturbed system in a critical case
p. 2153-2157
Analytic solutions of a class of equations with polynomial coefficients
p. 2158-2163
On the theory of ideal observability of linear systems with lag
p. 2164-2169
Stationary integrals and invariants of the shift operator along the solutions of differential systems
p. 2170-2177
Continuity and discontinuity of the Bellman function
p. 2178-2184
Formal transformations and the problem of distinguishing the center and focus
p. 2185-2189
Some problems of controllability and observability of two-parameter discrete systems
p. 2190-2195
The method of energy inequalities in the investigation of some degenerate linear operator-differential equations
p. 2196-2211
$2\vec b$-parabolic boundary value problems
p. 2212-2222
Difference schemes for nonlinear hyperbolic equations with piecewise-smooth solutions.~I
p. 2223-2239
The principle of the smoothing functional in the discretized regularization method
p. 2244-2248
New explicit $A$-stable methods for the numerical solution of differential equations
p. 2249-2251
Control of assigned states of a system with lags
p. 2252-2256
Nonstationary singularities of a system of three differential equations
p. 2257-2259
Some mixed problems related to the longitudinal striking of nonhomogeneous rods
p. 2260-2264
On the control theory of linear stochastic systems
p. 2265-2268
The solution of some dual integral equations of wave diffraction theory
p. 2269-2271
An integration method for normal systems of differential equations
p. 2272-2275
On the question of classes of first-order differential equations with stationary critical singular points
p. 2276-2278
The asymptotic behavior of the solutions of a linear differential system with a periodic coefficient matrix of the second kind
p. 2279-2281
Construction of the Green function of the Helmholtz equation for a semi-infinite rectangular domain with the aid of Bessel functions
p. 2282-2284