Izvestiya of Saratov University.
Mathematics. Mechanics. Informatics
ISSN 1816-9791 (Print)
ISSN 2541-9005 (Online)

Mathematics

Extremal Rational Functions on Several Arcs of the Unit Circle with Zeros on these Arcs
Solution of Integral Equations via Resolvents of Simplest Differential Operators
On Uniform Convergence of Transformations of Fourier Series on Multiplicative Systems
Harmonic Analysis of Periodic at Infinity Functions from Stepanov Spaces
The Solution of the Homogeneous Boundary Value Problem of Riemann with Infinite Index of Logarithmic Order on the Beam by a New Method
On Problem of Abstract Characterization of Universal Hypergraphic Automata
Extended Structures on Codistributions of Contact Metric Manifolds
To Chang Theorem. II
Approximate Solution of an Optimal Control Problem with Linear Nonhomogeneous Control System in Hilbert Space
On Analogue of Jordan – Dirichlet Theorem about the Convergence of the Expansions in Eigenfunctions of a Certain Class of Differential-Difference Operators
Symmetry Axes of Planar Polynomial Differential Systems
Аbout Some Boundary Problems in the Semispace for a Class of Pseudo-Differential Equations with Degeneracy
On Multiple Completeness of the Root Functions for a Class of the Pencils of Differential Operators
Integrability of a Partial Case of the Lowner Equation
Asymptotic Properties of Polynomials pˆα,βn (x), Orthogonal on Any Sets in the Сase of Integers α and β
Cohomology Rings of Semicubecal Sets
The M.A. Lavrentiev Inverse Problem on Mapping of Half-Plane Onto Polygon with Infinite Set of Vertices
The Approached Calculation of Eigenvalues of the Discrete Operator by Means of Spectral Traces of Resolvent Degree
About the Congruences of Two-Generated Monoid
The Problem of Convergence in Point Trigonometric Interpolation Process of Lagrange
On Inverse Problem for Sturm – Liouville Operator with Discontinuous Coefficients
The Full Class of Smooth Axially Symmetric Longitudinal-Vortex Unit Vector Fields
About Solution of Discrete Linear-Quadratic Optimal Control Problem
The Error of Approximation of Differentiable Functions of Several Variables by Means of Interpolatory Shape-Preserving Operators
About Completeness of Products of Functions, Initiated by Singular Differential Equations
Tolerant Bundle of Ways and Gurevich’s Theorem for Tolerant Spaces
Solution of Inverse Problem for the Diffusion Operator in a Symmetric Case
On Riesz Basises of Eigenfunctions of Integral Operators with Kernels Discontinuous on Broken Lines
On Spectral Property of Matrix Operators in Banach Space
On the Same Theorem on a Equiconvergence at the Whole Segment for the Functional Differential Operators
Absolute Convergence of Single and Double Fourier Series on Multiplicative Systems
Covariant and Contrvariant Homomorphisms of Games with Preference Relations
Leray – Serra Spectral Sequence for Tolerant Quasifibering of Tolerant Ways
On Transformation Operator for the System of Dirac Equations with Summable Potentials
Asymptotics Around the Degeneration Spot of Heat Equation Solution with Strong Degeneration
An Inverse Problem for Quasilinear Elliptic Equations
Recovering Differential Operators on a Graph with a Cycle and with Generalized Matching Conditions
On Convergence of Fourier – Vilenkin Series in L p [0, 1), 0 < p ≤ 1
Approximative Properties of Mixed Series by Lagerre’s Polynomials on Classes of Smooth Functions
On Inverse Nodal and Spectral Problems for Boundary Value Problems with Discontinuity Conditions Inside the Interval
About Approximation Multinominals, Orthogonal on Any Grids
On the Solvability of the Inverse Sturm – Liouville Problem in the Central Symmetry Case
On Laguerre Expansions Summability by the Linear Methods
On the Equiconvergence of Expansions for the Certain Class of the Functional-Differential Operators with Involution on the Graph
Three-Element Boundary Value Problem of Riemann Type for Metaanalytical Functions in a Circle
Approximating Properties of the Powers of the Differentiation Operator Resolvent
The Mixed Problem for the Differential Equation with Involution and Potential of the Special Kind
On a Approximate Solution of the Problem of Aspherical Convex Compact Set
The Inverse Problem of Spectral Analysis for the Matrix Sturm – Liouville Equation
Uniqueness of the Solution of the Inverse Problem for Differential Operators on Arbitrary Compact Graphs
Finite Closed 3(4)-Loops of Extended Hyperbolic Plane
Homotopy Groups of Space of Tolerant Loops
The Classification of Complexes of Lines in Zeroth Order Frame in F ̄2 3 Space
Approximating Properties of Solutions of the Differential Equation with Integral Boundary Condition
Hilbert Generalizations b-Bessel Systems
On One Special Mapping
On Weighted Analogs of Wiener’s and Levy’s Theorems for Fourier – Vilenkin Series
Variable Order and Step Algorithm Based on a Stages of Runge – Kutta Method of Third Order of Accuracy
Analysis of Heterogeneous Queueing Networks with Batch Movements of Customers
About Asymptotic Polynomials, Orthogonal on Any Grids
Nonorthogonal Multiresolution Analysis on Zero-Dimensional Locally Compact Groups
On Characterization Determining Entire Functions and Consistent with Riman’s Type Equation Dirichlet’s Series with Finetly-Valued Coefficients
Approximation of Functions by Borel Means of Fourier Series with Respect to Multiplicative Systems
On Iterative Method of Constructing Optimal Control for Singularly Perturbed Systems with Delay with Quadratic Constraints
Problem with Conditions on all Boundary for One 6-th Order Pseudoparabolic Equation
Optimality Solutions in Games with Preference Relations
Parametrization of Bivariate Nonseparable Haar Wavelets
The Characteristic of Stability of the Solution in the Problem of Convex Compact Set Asphericity
Λ-Summability and Multiplicators of Holder Classes of Fourierseries with Respect ̈ to Character Systems
On Explicit and Exact Solutions of the Markushevich Boundary Problem for Circle
Finite Closed 5-Loops of Extended Hyperbolic Plane
Solvability of Boundary Value Problems for the Schrodinger Equation with Purely Imaginary Coefficient
Inverse Problem for Sturm – Liouville Operators in the Complex Plane
To Chang Theorem. III
On Application of Elliptic Curves in Some Electronic Voting Protocols
On the Representation of Functions by Absolutely Convergent Series by H-system
Asymptotic Formulae for Weight Numbers of the Sturm – Liouville Boundary Problem on a Star-shaped Graph
Stability of Periodic Billiard Trajectories in Triangle
Recurrence Relations for Polynomials Orthonormal on Sobolev, Generated by Laguerre Polynomials
Approximation Properties of Dicrete Fourier Sums for Some Piecewise Linear Functions
Almost Periodic at Infinity Functions Relative to the Subspace of Functions Integrally Decrease at Infinity
Adjustment of Functions and Lagrange Interpolation Based on the Nodes Close to the Legendre Nodes
Connections of Nonzero Curvature on Three-dimensional Non-reductive Spaces
Approximation of Control for Singularly Perturbed System with Delay with Integral Quadratic Constraints
On Almost Nilpotent Varieties with Integer PI-Exponent
Equiconvergence Theorem for Integral Operator with Involution
Generalized Absolute Convergence of Series with Respect to Multiplicative Systems of Functions of Generalized Bounded Variation
On the Geometric Structure of the Continuos Mappings Preserving the Orientation of Simplexes
Linear Difference Equation of Second Order in a Banach Space and Operators Splitting
On Recovering Integro-Differential Operators from the Weyl Function
On an Inner Estimate of a Convex Body by the Lebesgue Set of Convex Differentiable Function
Embeddings of Generalized Bounded Variation Function Spaces into Spaces of Functions with Given Majorant of Average Modulus of Continuity
Well-posedness of the Dirichlet Problem for One Class of Degenerate Multi-dimensional Hyperbolic-parabolic Equations
On Multiple Completeness of the Root Functions of the Pencils of Differential Operators with Constant Coefficients
Estimation of Operator Norms in Eigenvalue Problems for Equations with Discontinuous Operators
Finding of Accessory Parameters for Mixed Inverse Boundary Value Problem with Polygonal Known Part of Boundary
On Idempotent Elements of Semigroup of Increasing Monotonous Mappings
Solvability of Evolutionary Equations in Generalized Transmission Problems for Shallow Shells
On Classical Solvability of One-Dimensional Mixed Problem for Fourth Order Semilinear Biparabolic Equations
On the Number of Solutions of Nonlinearity Boundary Value Problems with a Stieltjes Integral