Geodesic

Sommaire du Fascicule no. 1

Some boundary value problems for a certain class of singular partial differential equations
p. 3-14
A certain inverse problem for linear symmetric $t$-hyperbolicsystems with $n+1$ independent variables
p. 15-23
A mixed problem for a certain class of second order hyperbolic-parabolic equations
p. 24-31
Remarks on some transformations of systems of equations of {\v C}aplygin type
p. 32-35
Boundary value problems for equations of the type of Humbert's equation
p. 36-40
A certain analogue of Poisson's formula
p. 41-45
Some problems of the type of the Cauchy problem and problems with a shift for a certain degenerate hyperbolic equation
p. 46-58
Analyticity of the solutions of nonlinear transmission problems
p. 59-68
A priori estimates of generalized solutions of degenerate quasilinear elliptic equations
p. 69-78
A certain boundary value problem with shift for the equation $\operatorname{sign}y|y|^mu_{xx}+y_{yy}=0$
p. 79-88
On a priori estimates for the Tricomi and the Dirichlet problem for a certain equation with degeneracy of the type and of the order
p. 89-96
Smoothness of the solution of a certain boundary value problem for an equation of mixed type with two parallel lines of degeneracy
p. 97-102
The Darboux problem for a certain degenerate second order loaded integrodifferential equation
p. 103-108
On the inverse problem for a simple layer potential
p. 109-117
Connected operators and boundary value problems for equations of elliptic type
p. 118-128
The integral representability of the resolvent of a selfadjoint elliptic operator
p. 129-136
The Dirichlet problem for a certain equation of mixed type
p. 137-143
Determination of the density of a body from a prescribed potential
p. 144-147
Potentials for higher order elliptic equations, and inverse problems
p. 148-158
Global methods of studying the oblique derivative problem for elliptic equations
p. 159-171
The inverse problem of determining a body for the transport equation
p. 172-174
The determination of a coefficient in the lowest order term of a general parabolic equation
p. 175-176
A certain boundary value problem for a loaded heat equation
p. 177-179
On the question of the composition of singular integrals
p. 180-182
Letter to the editors: ``Functionally invariant solutions of second order quasilinear partial differential equations'' (Differencial'nye Uravnenija \textbf{11} (1975), 533--540)
Letter to the editors: ``Difference schemes of the sixth order of accuracy for a Poisson equation of an arbitrary number of dimensions'' (Differencial'nye Uravnenija \textbf{11} (1975), no.~5, 934--936)

Sommaire du Fascicule no. 2

A quasilinearization method for the construction of an approximate solution of a certain boundary value problem for ordinary differential equations
p. 195-199
The limit cycles of a certain differential equation
p. 200-205
Dynamical systems with invariant Lebesgue measure on connected, closed and orientable surfaces
p. 206-212
The escape of a certain nonlinear object from several more inert pursuers
p. 213-226
The resolvent and fractional powers of ordinary differential operators in spaces of smooth functions
p. 227-233
A theorem on critical cases of systems of difference equations
p. 234-240
The complete qualitative investigation of Duffing's equation
p. 241-255
Symbolic dynamics that are generated by homoclinic structures
p. 256-262
The problem of discrimination for the normal domain $N_4$ in the space $R^3$
p. 263-271
Higher order singularly degenerate differential operators with unbounded operator coefficients
p. 272-280
Algebraic invariants of multidimensional differential systems
p. 281-291
Conditions for a center for a certain Li\'enard equation
p. 292-298
The singular nonlinear boundary value problem for a second-order equation with a rapidly growing right-hand side
p. 299-304
A mixed problem for a hyperbolic system in space
p. 305-308
Characteristic problems with a principal part that contains mixed derivatives
p. 309-324
Asymptotic behavior with respect to time for the solutions of a strongly parabolic system with discontinuous coefficients
p. 325-330
The Cauchy problem for certain abstract hyperbolic equations of evenorder
p. 331-342
The normal solvability of the Dirichlet problem for a certain degenerate elliptic system
p. 343-347
A geometric method of solving systems of differential equations
p. 348-351
The asymptotic behavior of the solutions of a certain system of differential equations in the neighborhood of a singular point
p. 352-353
Stability of a trajectory
p. 354-355
Eigenvalues of a periodic boundary value problem for certain partial differential equations
p. 356-358
The approximability property of regular systems of linear differential equations
p. 359-361
The solvability of operator-differential equations of arbitrary order
p. 362-364
The approximate representation of relaxation oscillations
p. 365-368
A method of solving Abel and Riccati equations
p. 369-371
A priori estimates and nonlocal existence theorems for the solutions of quasilinear parabolic equations in $L_p$ spaces
p. 372-374
IV Всесоюзная конференция по теории и приложениям дифференциальных уравнений
p. 375-376

Sommaire du Fascicule no. 3

Theory of moving singular points of second order equations.~I
p. 387-416
A certain class of functional-differential equations
p. 417-427
Asymptotic behavior of the spectrum of a Sturm--Liouville operator in the case of a limit circle
p. 428-437
Dynamical systems with invariant Lebesgue measure on the surface of a torus
p. 438-445
$l$-evasion in linear differential games
p. 446-455
On the theory of linear inhomogeneous systems of differential equations with constant coefficients
p. 456-460
The approximate solution of a certain boundary value problem
p. 461-474
An estimate of the jump in the highest exponent of a linear system under exponential perturbations
p. 475-483
Controllability in multi-valued processes
p. 484-493
A mixed problem for certain parabolic-hyperbolic equations
p. 494-501
Certain inverse problems for degenerate hyperbolic equations
p. 502-510
Existence of a generalized solution of the Tricomi problem.~I
p. 511-528
Integral estimates of the fractional derivatives of the solutions of linear equations of elliptic type in the $L_2$ metric.~II
p. 529-539
A certain difference approximation of the Poisson equation
p. 540-548
Membership in the class $W_2^1$ of the classical solution of the Dirichlet problem for an elliptic equation in an arbitrary unbounded domain
p. 549-551
A study of the solutions of the Cauchy problem for semi-explicit differential equations with retarded argument
p. 552-554
Boundary value problems on finite and infinite intervals
p. 555-557
Solvability of a boundary value problem for a certain class of nonlinear ordinary differential equations
p. 558-560
On the question of the nonuniqueness of solutions of a first order differential equation
A boundary value problem for differential equations with deviating argument
p. 562-566
Petr Ivanovi{\v{c}} Kuznecov (on the fortieth anniversary of his scientific activity)
p. 567-570

Sommaire du Fascicule no. 4

Основные направления развития народного хозяйства СССР на 1976--1980 годы
Theory of moving singular points of second order equations. II
p. 579-598
Optimal controls in coefficient problems for univalent functions
p. 599-611
A problem of control from incomplete data
p. 612-620
The zeros of the oscillatory solutions of the equation $(p(t)x')'+f(t,$ $x,$ $x')=0$
p. 621-625
Optimal processes in the case of weakly differentiable connections. I
p. 626-636
Singular solutions in problems of maximum optimization of dynamical systems with a quadratic quality criterion
p. 637-644
On the question of the existence and uniqueness of the solution of ordinary differential equations
p. 645-652
A criterion for $\varepsilon $-controllability of a linear system
p. 653-657
A convergent iteration method for constructing solutions to systems in standard form
p. 658-667
A mathematical treatment of a certain problem of a longitudinal shock along a relaxing rod
p. 668-685
The branching of the solutions of mixed problems for almost linear hyperbolic systems of the plane
p. 686-699
Existence of a generalized solution of the Tricomi problem. II
p. 700-719
A regional-structural method
p. 720-728
Apriori-Absch\"atzungen der L\"osungen von Randwertproblemen f\"ur einige Differentialoperatorgleichungen
p. 729-739
The solutions of Painlev\'e's fifth equation
p. 740-742
On the question of the asymptotic properties of the renewal equation
p. 743-746
A criterion for the nonoscillation of a linear difference equation
p. 747-750
Necessary and sufficient conditions for the disconjugacy of the solutions of a second order linear equation
p. 751-753
On conditions for the monocyclicity of a certain system of differential equations
p. 754-757
A certain variant of an identity of Picone type, and Sturm's theorems for higher order ordinary differential equations
p. 758-759
A certain class of linear integral operators
p. 760-762
On the Tricomi problem for a second order linear equation of mixed type
p. 763-765
On the question of stability with respect to the first approximation
p. 766-769

Sommaire du Fascicule no. 5

The Riemann problem.~II
p. 779-799
The observability of nonstationary systems with lag
p. 800-805
The spectrum of a Schr\"odinger equation with a complex pseudoperiodic potential.~I
p. 806-814
Boundary value problems for equations with formally symmetric differential-difference operators
p. 815-824
The bounded solutions of first order operator-differential equations
p. 825-839
Absolute asymptotic stability of linear differential equations with infinitely many lags in a Banach space
p. 840-847
Maximin deviation in a differential game
p. 848-856
The approximation, by the method of V.\,K.~Dzjadyk, of solutions of problems for equations of hyperbolic type
p. 857-864
Certain problems that are connected with the theory of longitudinal shock along rods
p. 865-880
Hyperbolic equations with variable operator-valued coefficients
p. 881-891
The study of difference schemes for quasilinear degenerate elliptic equations
p. 892-901
A mixed problem for a first order hyperbolic system with a small parameter multiplying the derivatives
p. 902-907
Inclusions of Hammerstein type
p. 908-915
A system of integral equations in a space of generalized functions
p. 916-921
Conditions for the existence and uniqueness of a limit cycle for a certain two-dimensional differential system
p. 922-924
Solvability, and the convergence of the Galerkin method for the equations of flexible plates and shells in the case of a one-dimensional problem
p. 925-927
A differential equation that has solutions with algebraic movable singular points
p. 928-930
A boundary value problem with a discontinuous boundary condition
p. 931-933
Some topological properties of linear inhomogeneous systems
p. 934-936
Functionally invariant solutions and the nonuniqueness of the solution of the Darboux problem for degenerate hyperbolic equations
p. 937-939
On necessary conditions for the optimality of the controls in hybrid systems
p. 940-943
The number of limit cycles of a certain second order autonumous system
p. 944-946
Andre{\v\i} Vasil'evi{\v{c}} Bicadze (on the occasion of his sixtieth birthday)
p. 947-954

Sommaire du Fascicule no. 6

A three-point boundary vlaue problem for a nonlinear third order ordinary differential equation
p. 963-970
On the question of the properties of the set of solutions of differential inclusions
p. 971-977
The minimal Green's matrix of a multi-valued differential operator
p. 978-982
Integrals of fractional order, and singular boundary value problems
p. 983-990
A certain limit boundary value problem that does not satisfy S. N. Bern{\v s}te{\v\i}n's condition and has an application in the theory of capillary phenomena
p. 991-998
The regularisation of controls in an approach-evasion differential-difference game
p. 999-1006
The linear problem on the optimal control of periodic solutions
p. 1007-1011
An adiabatic invariant of a system of linear oscillators, and scattering theory
p. 1012-1018
Periodic and almost periodic solutions of singularly perturbed differential equations of neutral type
p. 1019-1027
An estimate of the eigenvalue that is smallest in absolute value for a certain periodic problem
p. 1028-1039
The spectrum of nonselfadjoint elliptic systems of arbitrary order
p. 1040-1051
Difference schemes for quasilinear elliptic equations in polar coordinates
p. 1052-1060
Weak solutions of the system of equations of reactor kinetics
p. 1061-1072
On imbedding theorems for a certain class of singular differential operators in a half-space
p. 1073-1083
Weight spaces of functions defined in a half-space
p. 1084-1098
A generalized Dirichlet problem for a certain class of elliptic differential operators that are degenerate on the boundary of the domain. Some spectral properties
p. 1099-1111
The Dirichlet problem for linear quasielliptic differential operators with unbounded lowest coefficients
p. 1112-1120
The integrals of the motion of nonlinear equations of Schr\"odinger type
p. 1121-1122
The existence of a definitely positive first integral
p. 1123-1124
Linear integral equations of the first kind in spaces of the type $H_s(R^n)$
p. 1125-1128
The dependence of the solutions of certain variational inequalities on the parameters
p. 1129-1130
On the question of the properties of the Cauchy matrix of a functional-differential equation
p. 1131-1133
Boris Pavlovi{\v{c}} Demidovi{\v{c}} (on the occasion of his seventieth birthday)
p. 1134-1138

Sommaire du Fascicule no. 7

Periodic solutions of certain second order equations
p. 1147-1150
The domain of definition of a Sturm--Liouville operator
p. 1151-1160
The singular solutions of nonlinear differential equations.~II
p. 1161-1173
Asymptotic solutions of certain linear inhomogeneous second order differential equations in a Banach space with a small parameter multiplying the highest derivative
p. 1174-1186
The oscillation and the disconjugacy of the solutions of nonlinear differential systems
p. 1187-1193
On the question of the representation of the solutions of linear functional-differential equations
p. 1194-1203
Relatively ideally observable systems
p. 1204-1210
Necessary optimality conditions for certain classes of discrete control systems
p. 1211-1218
Construction of the equations of a system of programmed motions in a sliding state
p. 1219-1222
Monotone differential equations.~II
p. 1223-1237
The problem of distinguishing the center and a focus for systems with nonzero linear part
p. 1238-1246
Comparison of equivalences of dynamical systems on the plane
p. 1247-1255
The spectral function of certain singular differential operators.~I
p. 1256-1266
The first boundary value problem for degenerate elliptic equations in a half-space
p. 1267-1281
Construction of a potential with quasiregular kernel in closed form
p. 1282-1289
Solution of one-dimensional mixed problems for a certain parabolic system in a domain with variable boundary
p. 1290-1296
On the averaging method in Hilbert space for integrodifferential equations
p. 1297-1300
A remark on the number of Ljapunov constants for conditions for a center of a certain differential equation
p. 1301-1302
Algebraic and algebraic-logarithmic moving singularities of systems of second order differential equations
p. 1303-1305
The behavior of the trajectories of a certain dynamical system in the Poincar\'e disc
p. 1306-1309
Reduction of a controllability problem to a boundary value problem
p. 1310-1312
The stabilization of nonlinear control systems
p. 1313-1315
A method of reducing a special boundary value problem to a Cauchy problem
p. 1316-1319
Regularity classes for second order vectorial equations
p. 1320-1322
The optimality of regularizing algorithms in the solution of ill-posed problems
p. 1323-1326
Nikola{\v\i} Evgrafovi{\v{c}} Ko{\v{c}}in (on the occasion of the 75th anniversary of his birth)
p. 1327-1331
Med{\v z}id Ljatifovi{\v{c}} Rasulov (on the occasion of his sixtieth birthday)
p. 1332-1337

Sommaire du Fascicule no. 8

Theory of the global properties of second order linear ordinary differential equations
p. 1347-1383
Necessary optimality conditions for minimax optimization problems
p. 1384-1391
Some cases of local generation of limit cycles in three-dimensional space
p. 1392-1403
The existence and uniqueness of the solutions of differential equations with lag in a Banach space
p. 1404-1409
The conditional stability of an invariant torus of a dynamical system
p. 1410-1416
The spectrum of a Schr\"odinger equation with a complex pseudoperiodic potential.~II
p. 1417-1426
The asymptotic behavior of the solutions of systems of linear differential equations in expanding domains
p. 1427-1433
Minimax filtering under quadratic constraints.~I
p. 1434-1446
The behavior of the solutions of a system of differential equations with lag near an integral manifold
p. 1447-1453
The construction of a Ljapunov function for self-regulation systems
p. 1454-1461
The problem of conjugation for systems of ordinary differential equations
p. 1462-1469
Difference schemes for parabolic equations with a nonlinear degeneracy.~I
p. 1470-1484
Diffraction problems with a noncylindrical boundary of discontinuity
p. 1485-1494
The smoothness of the solutions of certain equations of parabolic type.~I
p. 1495-1506
Conditions for evasion in linear differential games
p. 1507-1509
Representation of the solutions of a system of second order differential equations in the neighborhood of transcendental movable singular points
p. 1510-1511
Estimation of the error of the method of averaging functional corrections for linear equations
p. 1512-1515
\"Uber die Vollst\"andigkeit des Systems der verallgemeinerten Eigenfunktionen der Mehrgruppen-Diffusionsapproximation der Gleichung des Neutronentransports
p. 1516-1519
Extinguishing the rotation of a rigid body
p. 1520-1522

Sommaire du Fascicule no. 9

Theory of Weyl circles in the case of a nonselfadjoint system of second order differential equations
p. 1531-1540
Linear time-optimality problems with mixed constraints
p. 1541-1551
Limit points of the solutions of completely integrable autonomous Pfaffian systems in the neighborhood of a stationary point
p. 1552-1556
Behavior of the integral curves of a certain dynamical system
p. 1557-1567
Minimax filtering under quadratic constraints.~II
p. 1568-1579
A transformation of an asymptotic expansion of the period
p. 1580-1586
Stability criteria for systems with transformed argument that are based on the symmetrization of matrices
p. 1587-1595
Linear ordinary differential equations with singularities in the class of analytic functions
p. 1596-1604
The spectral function of certain singular differential operators.~II
p. 1605-1618
The smoothness of the solutions of certain equations of parabolic type. II
p. 1619-1624
Asymptotic behavior of the solution of a certain elliptic equation with discontinuous boundary conditions
p. 1625-1637
The Cauchy problem for a linear differential equation with a parameter
p. 1638-1644
Boundary value problems for differential equations with operator coefficients that depend on a parameter. I.~A priori estimates
p. 1645-1661
A Runge--Kutta method for the solution of two-dimensional nonlinear Volterra integral equations
p. 1662-1668
Asymptotic properties of the solutions of equations with after effect
p. 1669-1682
\"Uber eine Methode zur Konstruktion von Algorithmen zur N\"aherungsloesung linearer Integralgleichungen Volterraschen Typs.
p. 1683-1692
Rothe's method of approximate solution of the Cauchy problem for differential equations in a Banach space with a variable unbounded operator
p. 1693-1704
A two-sided numerical method of solving the boundary value problem $y^{'''}=f(t,y)$, $y(a_i)=c_i$ ($i=1,2,3$)
p. 1705-1711
Difference schemes for nonlinear Stefan problems
p. 1712-1714
A study of the stability of linear periodic differential systems by the method of variation of a parameter
p. 1715-1718
Representation of the solutions of a certain class of third order differential equations
p. 1719-1722

Sommaire du Fascicule no. 10

Andre{\v\i} Nikolaevi{\v{c}} Tihonov (on the occasion of his seventieth birthday)
p. 1731-1735
A problem in the theory of singular perturbations
p. 1736-1747
Singularly perturbed systems that contain an indeterminacy in the degeneracy
p. 1748-1757
Asymptotic behavior of the solution of a certain nonlinear problem with a singular boundary condition
p. 1758-1769
A method for studying the periodic solutions of systems of difference and differential-difference equations with small lag
p. 1770-1780
The solvability of boundary value problems for higher order parabolic equations in domains with curvilinear lateral boundaries
p. 1781-1792
A singularly perturbed equation of elliptic type with two small parameters
p. 1793-1803
The uniqueness of the classical (in the sense of V.\,A.~Il'in) solution of the mixed problem for a hyperbolic equation with time-dependent coefficients
p. 1804-1814
The regularity of boundary points for the solution of a quasilinear elliptic equation that is degenerate on the boundary of the domain
p. 1815-1823
The absolute and uniform convergence of Fourier series in the eigenfunctions of the operator of elasticity theory in an entire closed domain, and a substantiation of Fourier's method
p. 1824-1831
The $m$-fold completeness of the system of generalized eigen- and associated functions of a nonselfadjoint elliptic operator, and the membership of the classical eigen- and associated functions of the operator in the class $W_2^1$
p. 1832-1841
Theorems on the $m$-fold completeness of the generalized eigen- and associated functions from $W_2^1$ of certain boundary value problems for elliptic equations and systems
p. 1842-1851
The asymptotic expansion of the solution of a second order elliptic equation with a small parameter multiplying the highest derivatives
p. 1852-1865
The unique solvability of the mixed problem for a hyperbolic equation with complex potential
p. 1866-1876
The Dirichlet problem for a second order elliptic equation
p. 1877-1891
Generalized kernels of fractional order
p. 1892-1902
A certain method of investigating the solutions of difference equations of oscillation type in the case of a small step
p. 1903-1905
The exactness of the scheme of variable directions for the heat equation in an arbitrary domain
p. 1906-1914

Sommaire du Fascicule no. 11

Nonlinear functional-differential equations
p. 1923-1932
Asymptotic behavior of the bounded solutions of systems of nonlinear second order differential equations
p. 1933-1938
The application of certain methods of the theory of ordinary differential equations to the study of difference schemes in the problem of nonlinear oscillations of a circular plate
p. 1939-1945
The canonical integral in the neighborhood of a focus
p. 1946-1953
The minimal exponent of a two-dimensional diagonal system
p. 1954-1966
Solution of a boundary value problem on the half line by the nonstationary method
p. 1967-1970
Some properties of the solutions of nonlinear differential inequalities and equations with retarded argument
p. 1971-1984
Conditions for the conservation of asymptotic stability in the case of a double zero root with a nonprime elementary divisor
p. 1985-1993
Normal forms of completely integrable systems
p. 1994-1999
The behavior of the solutions of Levinson's equation
p. 2000-2008
The stability of the unperturbed motion in the critical case of two zero roots and a pair of pure imaginary roots
p. 2009-2013
Application of the difference method to boundary value problems for abstract elliptic equations
p. 2014-2018
On the question of the stability of the solutions of infinite systems of differential equations
p. 2019-2026
Systems of elements of a space over a space, and the problem of realizing a given trajectory of motion
p. 2027-2038
Asymptotic equivalence of linear differential systems with retarded argument
p. 2039-2043
The conformal mapping of the half-plane onto circular pentagons with a cut
p. 2044-2051
The characteristic Cauchy problem for a quasilinear analytic system
p. 2052-2063
The membership in the class $W_2^1$ of the classical solution of the Dirichlet problem for an elliptic equation in an arbitrary (bounded or unbounded) domain
p. 2064-2067
A solution of the problem of the excitation of two circular cylinders by an electrical dipole of arbitrary orientation
p. 2068-2075
Periodic solutions of certain nonlinear partial differential equations
p. 2076-2084
\"Uber die divergente Darstellung der Bilinearformen einer Klasse von Differentialoperatoren
p. 2085-2088
Selfadjointness of elliptic second order differential operators
p. 2089-2091
A test for the asymptotic stability of differential systems with $g$-perturbations
p. 2092-2094
A generalization of the Brockett-Lee theorem
p. 2095-2096
The smoothness of the solutions of certain equations of parabolic type. III
p. 2097-2100
The orientation of an inert rigid body
Integral curves of a certain class of differential equations that have a center
p. 2102-2104
Letter to the editors: ``Difference schemes for parabolic equations with a nonlinear degeneracy'' (Differencial'nye Uravnenija \textbf{12} (1976), no. 8, 1470-1484)
Letter to the editors: ``The existence of statistical solutions of a system of Vlasov equations'' (Differencial'nye Uravnenija \textbf{11} (1975), no. 7, 1256--1268)

Sommaire du Fascicule no. 12

Characteristic vectors and sets of functions of two variables and their fundamental properties
p. 2115-2128
Sufficient conditions for a strong minimum for degenerate optimal control problems
p. 2129-2138
Certain boundary value problems for a system of ordinary differential equations
p. 2139-2148
Minimax filtering in the case of quadratic constraints.~III
p. 2149-2158
Topological invariants of complex linear flows
p. 2159-2169
A certain generalization of the hypergeometric equation
p. 2170-2174
The existence of a mean value for a certain class of differential games that may be described by the wave equation
p. 2175-2187
A formula for the entropy of smooth dynamical systems
p. 2188-2192
The local dynamical equivalence of differential equations
p. 2193-2200
The dependence of the parameters of a dynamical system on the coefficients of a point transformation
p. 2201-2213
Local controllability
p. 2214-2222
The solvability of the first mixed problem of the dynamics of a three-dimensional elastic body
p. 2223-2232
A method for the approximation of regularized solutions for nonlinear equations of the first kind with an inexact operator
p. 2233-2241
The Cauchy problem for second order hyperbolic operator differential equations
p. 2242-2250
Integral representations and boundary value problems for certain elliptic type equations with a singular hyperplane
p. 2251-2264
A uniqueness theorem for the solution of the inverse problem for a quasilinear hyperbolic equation
p. 2265-2266
Steuerbarkeit von Systemen mit Retardierung nach der Anfangsfunktion
p. 2267-2268
Einige notwendige und einige hinreichende Bedingungen der Hurwitzschen Eigenschaft von Polynomen
p. 2269-2270
Zweiseitige Methoden Runge--Kuttaschen Typs zur numerischen L\"osung des Cauchyproblems f\"ur gew\"ohnliche Differentialgleichungen
p. 2271-2272
On the problem of distinguishing the center and focus for systems of nonlinear oscillations
p. 2273-2274
On the optimality of singular controls in systems with after-effect
p. 2275-2278
Estimation of the exponential growth of the solutions of certain linear partial differential equations with a highest order term
p. 2279-2280
Absence of cycles in the equation $y'=Q_2(x,y)/P_2(x,y)$, with a focus of third degree of structural instability
p. 2281-2282
\"Uber ein Problem Stefanschen Typs mit Verschwinden einer der Phasen
p. 2283-2284
Occurrence of an internal boundary layer in singularly perturbed systems of conditionally stable type
p. 2285-2286
Letter to the editors: ``Uniqueness and convergence of successive approximations for a certain class of Volterra equations'' (Differencial'nye Uravnenija \textbf{10} (1974), 1721--1724)