Geodesic

Sommaire du Fascicule no. 1

Striped three-webs in two-dimensional Riemannian geometry
p. 3-8
Approximation by trigonometric sums of Bern\v{s}tein type
p. 9-20
Radical classes of $\mathfrak{m}$-hypernilpotent groups
p. 21-26
On the question of the well-posedness of boundary value problems for equations defined in a~half-space
p. 27-32
Semigeodesic rhombic net
p. 33-38
A~certain property of the characteristic exponent of the solution of Hill's equation
p. 39-40
The computation of the moment acting on a~harmonically oscillating inclined plate
p. 41-50
The isomorphism of certain spaces of holomorphic functions
p. 51-53
Invariants of tensors in the vector space $L_3(\varepsilon )$ over the algebra $R(\varepsilon)$ ($\varepsilon^2=0$)
p. 54-58
The Cauchy problem for pseudodifferential systems of equations with constant symbols
p. 59-65
A~certain application of the normalization method to the theory of surfaces in three-dimensional space
p. 66-70
The stability of the solution of the linear prediction problem for stationary processes with discrete parameter
p. 71-81
Superposition measurability
p. 82-92
The extended Hermite-Fej\'er interpolation process
p. 93-96
Multidimensional ruled surfaces with holonomic families of $L^{\hat a}_s$-planes, and focal transforms of a~surface
p. 97-100
Computation of Szeg{\H o} and Bergman kernels for certain $n$-circular domains by means of multidimensional residues
p. 101-103
The structure of the curvature of $\overset\ast D_n^s$-spaces of type~$B$
p. 104-107
Certain properties of triangular set functions
p. 108-110
Two-dimensional integral equations of convolution type, with particular integrals, that are solvable in closed form
p. 111-114
Certain involutions of a~ruled space
p. 115-118
The Radon transform in a~Grassman manifold over local fields
p. 119-121
Necessary and sufficient conditions for the convergence of Lagrange interpolation processes at a~fixed point
p. 122-125
Projective mapping, and special types of spaces of linear elements
p. 126-130
Letter to the editors

Sommaire du Fascicule no. 2

The piecewise polynomial approximation of the solutions of integrodifferential equations
p. 3-13
Certain Dirichlet series
p. 14-16
The operation of multiplication in the space of distributions of finite order in the multidimensional case
p. 17-21
The~$T$ problem for a~certain nonlinear equation of mixed type
p. 22-30
Affine connections on a~tangent bundle
p. 31-42
Singular integral operators with Carleman shift in the case of piecewise continuous coefficients.~I,~II
p. 43-54
Projective metrics that are invariant with respect to quasigroups and groups of linear systems of collineations of $P_{3n}$ and $P_{3n+2}$
p. 55-61
The realization of a~complex Weyl space
p. 62-74
Preservation of the statistical representativity in certain ensembles of dynamical systems
p. 75-84
Sums of automorphisms of completely decomposable torsion-free abelian groups
p. 85-92
A~certain invariant of the Cauchy and Goursat systems
p. 93-103
Elements of tangency of a~surface in a~symplectic space. The general case
p. 104-107
Solutions that are finally of constant sign for nonlinear differential equations with lag
p. 108-111
The Riemannian spaces $\overset\ast D_n^s$. Second order recurrence
p. 112-115
A~certain class of set functions, and their application in the theory of vector-valued measures
p. 116-118
The number of linearly independent functions that are multiples of a~given divisor that contains the conjugate points of the Riemann surface of an algebraic function
p. 119-122
A~certain generalization of Laplace transforms
p. 123-125
The method of cross sections in interpolation problems for holomorphic functions of two variables
p. 126-129
The geometric characterization of functions from Bazilevi\v{c} subclasses
p. 130-132
On the theory of boundary value problems for analytic functions
p. 133-135
The domain of absolute convergence of multiple Dirichlet series
p. 136-139
Vladimir Vladimirovich Morozov (obituary)
p. 140-141

Sommaire du Fascicule no. 3

Estimates of the spectrum of a~difference of fractional powers of selfadjoint operators
p. 3-10
Point correspondences between multidimensional surfaces of projective spaces
p. 11-22
Mappings of families of sets in Hilbert space
p. 23-29
Subgroups of weakly uniform semigroups
p. 30-33
Singular integral operators with Carleman shift in the case of piecewise continuous coefficients.~II
p. 34-42
Some Hilbert problems for a~holomorphic vector-valued function that are solvable in closed form
p. 43-49
The order of strong approximation of functions by \v{C}eby\v{s}ev interpolation sums
p. 50-58
Best quadrature formulae for certain classes of functions with integrable $r$th derivative
p. 59-71
Nonlinear effects near the fronts of weak shock waves
p. 72-81
On the solution of a~nonlinear boundary value problem of Hilbert type.~I
p. 82-91
Conditions for the oscillation of the solutions of first order differential equations with retarded argument
p. 92-96
Abelian groups with isomorphic holomorphs
p. 97-99
Existence theorems for Fredholm integral equations with a~discontinuous operator and deviating arguments
p. 100-103
The Hardy--Littlewood property in Marcinkiewicz spaces
p. 104-106
A certain class of analytic curves in three-dimensional complex space
p. 107-110
The second and the third boundary value problem in the Hilbert ball for equations of elliptic type that are solved for the functional Laplacian
p. 111-114
Letter to the editors

Sommaire du Fascicule no. 4

Cubature formulae for multi-dimensional singular integrals.~II
p. 3-13
A~certain limit ratio in the theory of Szeg{\H o}'s orthogonal polynomials
p. 14-23
Mappings of families of sets in a~Loba\v{c}evski\u\i\ space
p. 24-32
A~certain extension of metric spaces
p. 33-36
The conditions for the convergence of an iteration process of order $(k+1)$ for the solution of nonlinear functional equations in the case of structurally stable initial data
p. 37-41
On the solution of a~nonlinear boundary value problem of Hilbert type.~II
p. 42-51
Estimation of a~trigonometric sum that is connected with the problem of divisors
p. 52-59
Integral equations of convolution type of the first kind with a~power kernel
p. 60-67
On the hydrodynamic theory of two-directional traffic flow
p. 68-73
A~geodesic field of $q$-dimensional directions in a~Finsler space, and an included system of paths
p. 74-86
The game ``with a~life line'' in a~multiply connected domain
p. 87-91
The possible values of the primes $p$ for minimal $h$-Hamiltonian $p$-groups
p. 92-94
A~certain property of entire characteristic functions of probability laws
p. 95-97
Conjugate Banach spaces with a~countable set of extreme points on the unit sphere
p. 98-99
Interpolation of continuous functions by piecewise monotone functions
p. 100-102
Boundary value problems for partial differential equations
p. 103-107
Functional interpolation in the Hardy classes $H^p$
p. 108-111
Generator systems in certain simple Lie algebras
p. 112-115

Sommaire du Fascicule no. 5

The connection between the holomorphy of $f(z,w)$ in one variable and its holomorphy in both variables
p. 3-8
Maximal nowhere dense sets in topological spaces
p. 9-16
Morera's theorem in multidimensional complex analysis
p. 17-19
Computation of the central element of the universal enveloping algebra of a~Witt algebra
p. 20-26
A~uniformly applicable asymptotic expansion in the neighborhood of the sound barrier of a~generator of a~solid of revolution
p. 27-30
Boundary value problems with a~shift for a vector on a~border Riemann surface
p. 31-39
On the computation of integrals of Cauchy type taken along the real axis
p. 40-46
Proof of the Babenko--Stein theorem
p. 47-51
Linear summability methods for orthogonal series in $L^2_{[0,1]}$
p. 52-66
The stability of linear systems with perturbed argument
p. 67-72
Projection-iteration methods for the solution of operator equations of the first kind
p. 73-77
Transformation of a~quotient of power series into a~regular $c$-continued fraction
p. 78-86
The conditional stability of countable systems of differential equations
p. 87-92
The growth of entire functions that are representable by Dirichlet series
p. 93-95
Interpolation and extrapolation of multidimensional continuous Markov sequences
p. 96-99
A~Noether theory for a~system of singular integral equations with shift on a~closed Riemann surface
p. 100-104
Generalized orders of entire functions
p. 105-108
The approximation of functions of the classes $\mathrm{Lip}\alpha$ by Fej\'er--Legendre sums
p. 109-112
Limit laws for sums of weakly dependent variables with finite variance
p. 113-114

Sommaire du Fascicule no. 6

A~boundary value problem for a~homogeneous elliptic equation with constant coefficients
p. 3-13
Spline methods for the solution of a~certain class of singular integrodifferential equations
p. 14-24
A~certain system of higher order equations of mixed type
p. 25-35
The minimax method for the solution of a~mathematical programming problem
p. 36-43
On the solution of a~certain boundary value problem of blast theory
p. 44-50
The application of the Ritz method to the solution of boundary value problems of nonlinear filtration
p. 51-55
A~certain problem of Gellerstedt
p. 56-59
Singular integral operators with shift along a~piecewise Lyapunov contour
p. 60-72
The solution of certain nonlinear problems of filtration theory
p. 73-81
Holomorphically projective transformations
p. 82-87
Nonintegrable solutions of a~singular integral equation
p. 88-95
Solution of a~certain nonlinear mixed boundary value problem of analytic function theory
p. 96-102
Nonregular polyanalytic functions
p. 103-113
A~singular integral equation in spaces of test functions and generalized functions on a~closed contour in the exceptional case
p. 114-123
The homogeneous Riemann problem in the case of a~countable set of open arcs
p. 124-135
Conditions for the representation of functions by the Martinelli--Bochner integral
p. 136-142
A~remark on a~certain metric in the tangent bundle
p. 143-146
An orthotropic semi-infinite plate with rectilinear boundary under the action of concentrated forces and moments that are applied at an interior point of the plate
p. 147-154
The completeness of systems of functions $\{\Phi^k\}$
p. 155-165
Lyubov' Ivanovna Chibrikova (on the occasion of her fiftieth birthday)
p. 166-167

Sommaire du Fascicule no. 7

The structure of the lexical functions that can be represented in finite-dimensional linear automata
p. 3-9
On the question of difference schemes with a~high order of precision for an ordinary differential equation with a~regular singularity
p. 10-18
A~representation of ordered semigroups with involution
p. 19-29
Approximate solution of multidimensional singular integral equations.~I
p. 30-41
Orthogonal trajectories of a~geodesic field
p. 42-46
Generalized integration operators that can be continued analytically from zero
p. 47-53
Certain questions of the theory of vector-valued measures
p. 54-63
A~certain class of multidimensional two-webs
p. 64-75
On the question of the tensorial characterization of algebraic surfaces
p. 76-79
Direction fields on~2-manifolds
p. 80-91
A~certain optimal control problem for an elliptic equation
p. 92-98
The Egerv\'ary--Tur\'an interpolation process, constructed for an extended system of \v{C}eby\v{s}ev nodes
p. 99-102
Pairs of ruled manifolds in three-dimensional projective space
p. 103-106
Reduction of a~recurrent affinor to canonical form
p. 107-110
Intrinsic geometry of a~hypercone that is normalized self-polarly
p. 111-113
Normal measures in a~product of bicompacta, and a~certain problem of V.\,I.~Ponomarev
p. 114-116
Framing a~hypersurface in a~space with degenerate metric
p. 117-120

Sommaire du Fascicule no. 8

Certain classes of complexes of oriented spheres
p. 3-9
Consistency of linear operators in a~sequence space
p. 10-16
The use of approximation in the study of critical cases
p. 17-18
Operator colligations of open systems with scattering channels
p. 19-28
The almost Grassmann manifold that is connected with an $(n+1)$-web of multidimensional surfaces
p. 29-38
On a~conjecture of A.~Schinzel
p. 39-45
Fuchs~5 groups with cardinality $\aleph_1$
p. 46-54
Conditions for the applicability of a~certain linear interpolation method of solving functional equations
p. 55-63
A~certain class of solvable groups
p. 64-69
The differentiability of sums of series of Jacobi polynomials
p. 70-80
The Noetherianness of operators of potential type in weight spaces of functions $p$-summable with weight
p. 81-90
A~certain nonlinear problem that is related to the Thomas--Fermi--Dirac equation
p. 91-93
The trigonometric moment problem associated with a system of functions $\omega_j(x)\in\Omega$, $j=1\dots,m$
p. 94-96
A~study of the convergence of all possible versions of extending the Hermite--Fej\'er interpolation process
p. 97-101
Cosymmetry objects of the quaternionic quasisymplectic space $\overline{\mathrm{Sp}}^m_{2m+1}(i, j)$
p. 102-105
A~convergent linear-fractional integral of the geodesics in two-dimensional affinely connected spaces.~I
p. 106-108

Sommaire du Fascicule no. 9

A~certain theorem of S.\,B.~Ste\v{c}kin on absolute convergence, and series in systems of characters of zero-dimensional abelian groups
p. 3-9
A~certain property of webs with zero curvature
p. 10-13
Kat\v etov spaces
p. 14-18
On the estimation of the period length of a~quadratic irrationality
p. 19-24
Four-dimensional Bol webs of elliptic or hyperbolic type
p. 25-34
Exponential stability of positive semigroups in a~linear topological space
p. 35-42
The divergence of the Lagrange interpolation process
p. 43-47
On the evasion problem for a~certain class of differential games
p. 48-52
On the geometry of K\"ahlerian manifolds
p. 53-58
The approximation of periodic functions of two variables by sums of Marcinkiewicz type
p. 59-67
The extraction of roots in topological groups
p. 68-75
Experiments with automata relative to regular prefix-closed events
p. 76-83
An everywhere divergent extended Hermite-Fej\'er interpolation process
p. 84-87
The convergence of Lagrange interpolation processes
p. 88-91
Dimension functions on Boolean logics.~I
p. 92-94
Approximate solution of a~certain class of systems of nonlinear differential equations
p. 95-98
Functions that are conjugate to summable functions
p. 99-100
Solution of functional equations with operators that have singular points
p. 101-104
The approximation in an integral metric of functions that are defined outside an interval
p. 105-107
A~property of linear means of a~Fourier series
p. 108-110

Sommaire du Fascicule no. 10

The geometry of a three-dimensional surface~$V_3$ of carrying four families of rectilinear generators in a five-dimensional projective space~$P_5$
p. 3-14
Factorization of degenerate matrix-valued functions
p. 15-22
Discontinuous solutions of variational problems with higher derivatives
p. 23-32
Fourier coefficients with respect to a~certain orthonormal system that forms a~basis in the space of continuous functions
p. 33-46
Determination of the enveloping lines of contact of mutually enveloped surfaces
p. 47-50
Exponential stability of positive semigroups in a~topological linear space.~II
p. 51-61
On the question of the existence of a~solution of a~Hammerstein equation with discontinuous mapping
p. 62-70
The Jacobson and Baer radicals of rings, and their multiplicative semigroups
p. 71-79
Extension of an outer homomorphism of Boolean algebras that is $\sigma$-continuous at zero
p. 80-81
Compact homogeneous spaces and invariant affine connections on them
p. 82-85
A~mixed boundary value problem with a~discontinuous shift
p. 86-88
Dimension functions on Boolean logics.~II
p. 89-90
The growth of entire functions that are represented by Dirichlet series
p. 91-93
The maximal partial correlation coefficient of two $\sigma$-algebras relative to a~third $\sigma$-algebra
p. 94-96
The fundamental objects of a~regular hyperband
p. 97-99
In memoriam Boris Mikhailovich Gagaev
p. 100-101

Sommaire du Fascicule no. 11

Biquasisimple algebras, biquasimatrices, and spin representations of biquasinoneuclidean motions
p. 3-10
Scattering problems for a~pair of spaces with an unbounded identification operator
p. 11-20
The analytic representation of operators with an abstract norm
p. 21-32
Extremal problems in classes of functions that are regular in the half-plane
p. 33-40
Interpolation on the sphere
p. 41-46
Stable order relations on a~symmetric semigroup of partial transformations
p. 47-56
A~certain generalization of Boolean algebras
p. 57-65
Best approximation of functions by means of entire functions in a~domain of the form of a~strip
p. 66-74
The methods of T.~Kato and M.\,G.~Slobodjanski\u\i .~II
p. 75-77
Сильная суммируемость рядов матричными методами,~I
p. 78-88
A~singular integral equation in a~class of fundamental and generalized functions on an open contour
p. 89-92
The existence of discontinuous solutions of multidimensional variational problems
p. 93-97
Certain cases of the reduction of the study of weakly integrable functions to the study of Pettis-integrable functions
p. 98-101
A boundary value problem without initial conditions for a~certain equation with functional Laplacian in Hilbert space
p. 102-105
Conditions for a~regular hyperband to be quadratic
p. 106-108
Three-webs over commutative associative algebras
p. 109-112

Sommaire du Fascicule no. 12

Some criteria for the solvability of finite groups
p. 3-5
Hardy--Littlewood inequalities for periodic conjugate harmonic functions of several variables
p. 6-15
The computation of the sums of certain series containing polygamma functions
p. 16-19
A~certain boundary value problem for a~nonlinear elliptic equation with degeneracy on the boundary of the domain
p. 20-29
The convergence of difference schemes for quasilinear equations that are parabolic on the solution
p. 30-42
Elliptic lines and Euclidean planes over tensor products of fields
p. 43-52
Сильная суммируемость рядов матричными методами,~II
p. 53-63
A~certain integral equation
p. 64-70
The convergence of vector fields, and convergent nets of a~space with an affine connection of two dimensions
p. 70-78
Solution of the problem of jet flow of a~weighted liquid with one free surface
p. 79-82
On the question of an isotropic geodesic field of multidimensional directions
p. 83-86
Projective mapping, and special types of spaces of linear elements with general connection.~I
p. 87-92
The univalence of the general solution of an interior inverse boundary value problem
p. 92-95