Geodesic

Sommaire du Fascicule no. 1

An estimate for the sum of a Dirichlet series on an arc of bounded slope
p. 3-13
Theorems on direct and inverse approximation by algebraic polynomials and piecewise polynomials in the spaces $H^m(a, b)$ and $B^s_{2,q}(a, b)$
p. 14-34
Asymptotic behavior of solutions of the inhomogeneous Schrödinger equation on noncompact Riemannian manifolds
p. 35-49
On the problem of solvability of nonlinear boundary value problems for shallow isotropic shells of Timoshenko type in isometric coordinates
p. 50-68
On maximal operators associated with singular hypersurfaces
p. 69-76
On triangulation of the plane by pencils of conics III
p. 77-97

Sommaire du Fascicule no. 2

Accuracy of an implicit scheme for the finite element method with a penalty for a nonlocal parabolic obstacle problem
p. 3-21
On quasiinvariance of harmonic measure and Hayman–Wu theorem
p. 22-36
Wave analysis and representation of fundamental solution in modified couple stress thermoelastic diffusion with voids, nonlocal and phase lags
p. 37-58
On one method for solving a mixed boundary value problem for a parabolic type equation using operators $\mathbb{AT}_{\lambda,j}$
p. 59-80
On the classification of points of the unit circle for subharmonic functions of class $\mathfrak{A}^*$
p. 81-84
On the number of components of the essential spectrum of one $2\times2$ operator matrix
p. 85-90
Transformation model of the dynamic deformation of an elongated cantilever plate mounted on an elastic support element
p. 91-99

Sommaire du Fascicule no. 3

Integrability of series with respect to multiplicative systems and generalized derivatives
p. 3-14
Investigation of the asymptotics of the eigenvalues of a second order quasidifferential
p. 15-37
Coefficient inverse problem for an equation of mixed parabolic-hyperbolic type with a non-characteristic line of type change
p. 38-49
Classical solution of the Cauchy problem for a semilinear hyperbolic equation in the case of two independent variables
p. 50-63
Averaging of a normal system of ordinary differential equations of high frequency with a multipoint boundary value problem on a semi-axis
p. 64-69
Integration of a sine-Gordon type equation with an additional term in the class of periodic infinite-gap functions
p. 70-83
Lower semicontinuity of distortion coefficients for homeomorphisms of bounded $(1, \sigma)$-weighted $(q,p)$-distortion on Carnot groups
p. 84-90
Spectral relations for a matrix model in fermionic Fock space
p. 91-96

Sommaire du Fascicule no. 4

On decompositions and transitive actions of nilpotent Lie groups
p. 3-14
Variation and $\lambda$-jump inequalities on $H^p$ spaces
p. 15-19
Conditions for the existence of power solutions to a linear difference equation with constant coefficients
p. 20-30
On the existence of an eigenvalue of the generalized Friedrichs model
p. 31-38
Sharpening of Turán-type inequality for polynomials
p. 39-46
On infinite spectra of oscillation exponents of third order linear differential equations
p. 47-66
On the absolute convergence of Fourier series of almost periodic functions
p. 67-79
On the Baillie PSW-conjecture
p. 80-88
On undecidability of unary non-nested PFP-operators for one successor function theory
p. 89-93

Sommaire du Fascicule no. 5

Yuri Gennad'evich Konoplev. Scientist, teacher, human
p. 3-7
Controlled frames in $n$-Hilbert spaces and their tensor products
p. 8-29
The variation operator of differences of averages over lacunary sequences maps $H^1_w(\mathbb{R})$ to $L^1_w(\mathbb{R})$
p. 30-36
Construction of first-order invariant differential operators
p. 37-46
A multiparametric family of solutions to the Volterra linear integral equation of the first kind
p. 47-62
Integration of the Korteweg-de Vries equation with time-dependent coefficients in the case of moving eigenvalues of the Sturm–Liouville operator
p. 63-78
Exact formulas for estimating the area of flow regions in free boundary problems
p. 79-84
Formula for regularized trace of $2m$-order differential operator with periodic boundary conditions
p. 85-90
Weak solvability of one model of a nonlinearly retarded fluid in a thermal field
p. 91-96

Sommaire du Fascicule no. 6

Inequalities for the differences of averages on $H^1$ spaces
p. 3-14
Logical specifications of effectively separable data models
p. 15-26
On the best approximation of analytic in a disk functions in the weighted Bergman space $\mathscr{B}_{2,\mu}$
p. 27-36
A problem with analogue of the Frankl and mixing conditions for the Gellerstedt equation with singular coefficient
p. 37-48
Subharmonic functions with separated variables and their connection with generalized convex functions
p. 49-67
Conditions for ultimate boundedness of solutions and permanence for a hybrid Lotka–Volterra system
p. 68-79
On simultaneous approximation of certain classes of functions in the Bergman space $B_2$
p. 80-88
Сurvilinear three-webs with automorphisms
p. 89-97

Sommaire du Fascicule no. 7

A. P. Norden — an outstanding Soviet scientist and organizer of science (to the 120th anniversary of his birth)
p. 3-8
Essentially quasi-injective modules and their direct sums
p. 9-23
On the best simultaneous “angle” approximation in the mean of periodic functions of two variables from some classes
p. 24-36
Lie algebras of projective motions of rigid $h$-spaces $H_ {32,3}$ of the type $\{32\}$
p. 37-46
Investigation of the dimension of the spectral projection of a self-adjoint second order quasidifferential operator
p. 47-62
Asymptotic moment stability of solutions to systems of nonlinear differential Itô equations with aftereffect
p. 63-76
Existence of positive solutions of symmetric variational eigenvalue problems
p. 77-84
Uniqueness results for the difference operators using the conception of sharing value
p. 85-105

Sommaire du Fascicule no. 8

Identification of the local changes in age-structured population dynamics with missing initial condition
p. 3-19
On a difference equation with holomorphic coefficients generated by a hexagon
p. 20-26
Unconditional convergence of the differences of Fejér kernels on $L^2(\mathbb{R})$
p. 27-33
Methods for solving ill-conditioned systems of linear algebraic equations that improve the conditionality
p. 34-44
On a priori estimate of periodic solutions of a system of nonlinear ordinary differential equations of the second order
p. 45-54
On Laplace invariants of two-dimensional nonlinear equations of the second order with homogeneous polynomial
p. 55-64
Uniform attractors for the Bingham model
p. 65-80
Optimization of calculations in modeling the breaking of plasma oscillations
p. 81-93
Approximation of positive solutions of symmetric eigenvalue problems with nonlinear dependence on the spectral parameter
p. 94-99

Sommaire du Fascicule no. 9

Integrability and Boas type results for a generalized Fourier–Bessel transform
p. 3-15
An oscillation inequality on a complex Hilbert space
p. 16-21
Inverse problem for a fourth-order differential equation with the fractional Caputo operator
p. 22-33
Conformal mapping of a strip onto a circular numerable polygon of strip type
p. 34-44
Existence of an asymptotically almost periodic solution for a fractional semilinear problem
p. 45-55
On rational approximations of the conjugate function on a segment by Abel–Poisson sums of Fourier–Chebyshev integral operators
p. 56-73
Properties of the controllability set of one class of differential inclusions
p. 74-81
Forward and inverse problems for the Benney–Luke type fractional equations
p. 82-91
An analog of the Poincaré metric and isoperimetric constants
p. 92-99
Filtered deformations of graded non-alternating Hamiltonian Lie algebras
p. 100-105

Sommaire du Fascicule no. 10

Rate of convergence of certain Fourier series of functions of generalized bounded variation
p. 3-17
Some new congruences for simultaneously $s$-regular and $t$-distinct partition function
p. 18-21
On some extensions of $\pi$-regular rings
p. 22-33
Coefficient inverse problem for an equation of mixed parabolic-hyperbolic type with nonlocal conditions
p. 34-44
Convergence of the trajectories of a non-Volterra quadratic stochastic operator
p. 45-50
Propagation of eigenwaves in plane three-layer media
p. 51-60
Countably many positive solutions for iterative system of boundary value problems on time scales
p. 61-76
Expansions of eigenvalues of a discrete bilaplacian with two-dimensional perturbation
p. 77-89
Abelian groups with solvable Lie endomorphism rings
p. 90-97
The simplest transformation model of deformation of a rod-strip fixed on a double-sided support element through elastic interlayers
p. 98-106

Sommaire du Fascicule no. 11

Isochronous centers and foci of two-dimensional holomorphic differential systems
p. 3-11
Schwarz and Dirichlet problems for $ \bar{\partial} $-equation in a triangular domain
p. 12-22
On the Ries inequality and the basicity of systems of root vector functions of $2m$th order Dirac-type operator with summable coefficient
p. 23-34
Weighted Sobolev orthogonal systems with two discrete points and Fourier series with respect to them
p. 35-50
A note on Visser's inequality
p. 51-60
Jordan test for the Haar-type systems
p. 61-80
The shortest polygonal chains in the Heisenberg group
p. 81-87
Two variants of stating problems of mechanics of a rod-strip with a section of one-sided fixing of finite length on a rigid support element
p. 88-96
Generalizations of Sobolev classes to the metric and topological cases
p. 97-104
The second-kind involutions of upper triangular matrix algebras
p. 105-110

Sommaire du Fascicule no. 12

On the infinite number of eigenvalues of the two-particle Schrödinger operator on a lattice
p. 3-11
On the existence and uniqueness of a positive solution to a boundary value problem with integral boundary conditions for one nonlinear ordinary differential equation of the second order
p. 12-19
Certain generalizations of Jacobi polynomial and their properties
p. 20-37
On the regularization of one class of sum-difference equations with periodic coefficients
p. 38-43
On one algorithm for constructing the Fourier transform of the function ${{\overline{V }}_{m}}\left( x \right)$ to determine a discrete analog of one differential operator
p. 44-56
On one boundary value problem for the Gellerstedt equation with a singular coefficient
p. 57-70
Hayers–Ulam–Rassias stability of linear systems of differential equations with generalized action and delay
p. 71-84
On the Hyers–Ulam stability of Bernoulli's differential equation
p. 85-93
Analysis of the formation of an inner solution near the crest of steep surface waves of infinite depth
p. 94-100
Fixed points of transformation of a renormalization group in a generalized fermionic hierarchical model
p. 101-108