Geodesic

Sommaire du Fascicule no. 1

One Inverse Problem for the Sturm--Liouville Operator
p. 3-16
Projection Greedy Algorithm
p. 17-28
Sharp Inequalities for Rational Functions on a Circle
p. 29-36
Quotient Divisible Groups of Rank~2
p. 37-51
Operators of Almost Hadamard-Type and the Hardy--Littlewood Operator in the Space of Entire Functions of Several Complex Variables
p. 52-64
On Matrices Having $J_m(1)\oplus J_m(1)$ as the Cosquare
p. 65-74
Inverse Approximation Theorems in the Spaces $S^{(p,q)}(\sigma^{m-1})$
p. 75-89
Elliptic Differential-Difference Equations of General Form in the Half-Space
p. 90-98
A Theorem of Sylvester--Gallai Type for Abelian Groups
p. 99-109
Comparison of Arithmetic, Geometric, and Harmonic Means
p. 110-118
Bendable Surfaces without Visible Deformations of Their Shape
p. 119-130
On Expansions of Solutions of Riccati's Equation in Asymptotic Series
p. 131-142
Asymptotic Solution of the Cauchy Problem for a First-Order Differential Equation with a Small Parameter in a Banach Space
p. 143-150
Rotary Maps and Sphere Projections
p. 151-154
Minimal Contact Circuits for a Sequence of Boolean Functions
p. 155-157

Sommaire du Fascicule no. 2

On the Volterra Factorization of the Wiener--Hopf Integral Operator
p. 163-169
Inheritance of Smoothness by Extremal Functions in Bergman Spaces~$A_p$ for $0$
p. 170-191
Subgroups of the Fan of Sylow Subgroups and the Supersolvability of a Finite Group
p. 192-203
The Fatou Property for General Approximate Identities on Metric Measure Spaces
p. 204-220
On Joint Universality of the Riemann Zeta-Function
p. 221-233
A Remark on the Steklov--Poincar\'e Inequality
p. 234-238
Existence of Semiregular Solutions of Elliptic Systems with Discontinuous Nonlinearities
p. 239-257
Remarks on Galois Rational Coverings
p. 258-265
Sharp Inequalities between the Best Root-Mean-Square Approximations of Analytic Functions in the Disk and Some Smoothness Characteristics in the Bergman Space
p. 266-281
On Epsilon-Cores of Cooperative Games with Fuzzy Payoffs
p. 282-288
Lower Bounds for the Square-to-Linear Ratio for Plane Peano Curves
p. 289-296
On Entire Solutions of a Class of Second-Order Algebraic Differential Equations
p. 297-308
Geodesic Mappings of Equiaffine and Ricci Symmetric Spaces
p. 309-312
Some Properties of Lattice Ordered Rings
p. 313-316
Existence of Monochromatic Simplices of Given Volume in a Colored Rational Lattice
p. 317-320

Sommaire du Fascicule no. 3

Upper Bounds for the Expected Maxima of Independent Random Variables Given Known First Four Moments
p. 323-335
Binary Leibniz Algebras
p. 336-344
Mixed Problem for a General 1D Wave Equation with Characteristic Second Derivatives in a Nonstationary Boundary Mode
p. 345-357
Three Formations over~$\mathfrak U$
p. 358-367
Refinement of Relations between Mixed Moduli of Smoothness in the Metrics of $L_p$ and $L_\infty$
p. 368-385
On Shallit's Minimization Problem
p. 386-404
On the Recovery of Solutions of a Generalized Cauchy--Riemann System in a Multidimensional Spatial Domain from Their Values on a Piece of the Boundary of This Domain
p. 405-423
Analogs of Schmidt's Formula for Polyorthogonal Polynomials of the First Type
p. 424-433
Approximation of Functions by Discrete Fourier Sums in Polynomials Orthogonal on a Nonuniform Grid with Jacobi Weight
p. 434-449
Inequalities between Best Polynomial Approximants and Smoothness Characteristics of Functions in~$L_2$
p. 450-458
On Sequential Properties of Spaces of Measures
p. 459-464
Exact Discretization of the $L_2$-Norm with Negative Weight
p. 465-470
Invariant Schr\"odinger Operators with Point Interactions at the Vertices of a Regular Polyhedron
p. 471-477
On Somos-4 and Somos-5 Sequences
p. 478-480

Sommaire du Fascicule no. 4

Approximation Properties of the Vall\'ee-Poussin Means of Partial Sums of a Special Series in Laguerre Polynomials
p. 483-497
Orthogonality Relations for the Primitives of Legendre Polynomials and Their Applications to Some Spectral Problems for Differential Operators
p. 498-506
Absolute Continuity of the Spectrum of a Periodic 3D Magnetic Schr\"{o}dinger Operator with Singular Electric Potential
p. 507-523
On a Ramanujan Identity and Its Generalizations
p. 524-536
On the Regular Behavior of Entire Functions of Zero Order along Curves of Regular Rotation
p. 537-549
Regularity of the Solution of the Prandtl Equation
p. 550-568
Solvability of Independent Systems of Equations in Finitely Generated Nilpotent Groups
p. 569-575
Mixing Sets for Rigid Transformations
p. 576-583
Multipoint Pad\'e Approximation of the Psi Function
p. 584-591
Two Examples Related to Properties of Discrete Measures
p. 592-597
The Existence of Zeros of Multivalued Functionals, Coincidence Points, and Fixed Points in~$f$-Quasimetric Spaces
p. 598-609
Feedback and Impulse Behavior of Differential-Algebraic Equations
p. 610-629
On the Positivity of Average Sums of Sine Series with Monotone Coefficients
p. 630-634
Locally Free Resolution of Coherent Sheaves in Arbitrary Dimension
p. 635-640

Sommaire du Fascicule no. 5

Categories of Symmetry Groups of the Space of Solutions of the Special Doubly Confluent Heun Equation
p. 643-657
On the Distributivity and Modularity Properties of the Lattice of Fitting Classes
p. 658-671
A Bilogarithmic Criterion for the Existence of a Regular Minorant that Does Not Satisfy the Bang Condition
p. 672-687
Asymptotics of the Solution of a Variational Problem on a Large Interval
p. 688-703
Inversions of H{\"o}lder's Inequality
p. 704-714
Dynamics of Spatially Distributed Chains of Coupled Systems of Equations in a Two-Dimensional Domain
p. 715-725
Regularity of Continuous Multilinear Operators and Homogeneous Polynomials
p. 726-735
Cutting Polygons Composed of Equal Rectangles into Similar Rectangles
p. 736-743
Automorphisms of Surfaces of Markov Type
p. 744-750
The Moutard Transformation for the Davey--Stewartson~II Equation and Its Geometrical Meaning
p. 751-765
On Fourier Series on the Torus and Fourier Transforms
p. 766-772
Uniform Convexity in Nonsymmetric Spaces
p. 773-785
Weierstrass Functions Separate All Traces
p. 786-788
Yudin--Hermite Extremal Problems for Polynomials
p. 789-795
Regular Spectral Problems of Hyperbolic Type for a System of First-Order Ordinary Differential Equations
p. 796-800

Sommaire du Fascicule no. 6

Almost Binarity of Countably Categorical Weakly Circularly Minimal Structures
p. 803-823
Inverse Problem for Finding the Order of the Fractional Derivative in the Wave Equation
p. 824-836
Automorphisms of Nonnormal Toric Varieties
p. 837-855
Theories of the Classical Propositional Logic and Substitutions
p. 856-864
Asymptotics of Sums of Cosine Series with Fractional Monotonicity Coefficients
p. 865-874
Chebyshev's Problem of the Moments of Nonnegative Polynomials
p. 875-890
The Cocompleteness of the Category $\mathbf{Tych}^G$
p. 891-898
On Unstable Solutions with a Nonmonotone Boundary Layer in a Two-Dimensional Reaction-Diffusion Problem
p. 899-910
A Note on the Classical Implicit Function Theorem
p. 911-915
Approximatively Compact Sets in Asymmetric Efimov--Stechkin Spaces and Convexity of Almost Suns
p. 916-921
The Kantorovich Problem with a Parameter and Density Constraints
p. 922-926
Crossing of the Critical Energy Level in Hamiltonian Systems with Slow Dependence on Time
p. 927-931
On the Discreteness of the Spectrum of Matrix Schr\"odinger and Dirac Operators with Point Interactions
p. 932-938
Spectral Asymptotics of Solutions of a $2\times 2$ System of First-Order Ordinary Differential Equations
p. 939-943
Variational Formulation of the Problem of Finding Generalized Solutions for Quasilinear Hyperbolic Systems of Conservation Laws
p. 944-947
Almost Sharp Descriptions of Traces of Sobolev Spaces on Compacta
p. 948-953
A solution to a problem on spectra of sign patterns of matrices