Geodesic

Sommaire du Fascicule no. 1

An Approach to the Solution of the Initial Boundary-Value Problem for Systems of Fourth-Order Hyperbolic Equations
p. 3-16
Lie Algebras of Heat Operators in a Nonholonomic Frame
p. 17-32
$\mathrm P=\mathrm W$ Phenomena
p. 33-46
Andronov--Hopf Bifurcation in Logistic Delay Equations with Diffusion and Rapidly Oscillating Coefficients
p. 47-63
Variational Inequalities and Analogs of the Hopf Theorems
p. 64-80
Approximation of a Multivalued Solution of the Hamilton--Jacobi Equation
p. 81-93
New Estimate for Kloosterman Sums with Primes
p. 94-101
Lattice of Definability in the Order of Rational Numbers
p. 102-118
On Hamiltonian Minimality of Isotropic Nonhomogeneous Tori in $\mathbb{H}^n$ and $\mathbb C\mathrm P^{2n+1}$
p. 119-129
On the Question of Definability of Homogeneously Decomposable Torsion-Free Abelian Groups by Their Homomorphism Groups and Endomorphism Rings
p. 130-136
Solvability of a Mixed Problem with Nonlinear Boundary Condition for a One-Dimensional Semilinear Wave Equation
p. 137-152
Decomposing a Matrix into Two Submatrices with Extremely Small Operator Norm
p. 153-157

Sommaire du Fascicule no. 2

Normal Automorphisms of Free Groups of Infinitely Based Varieties
p. 163-170
Radiation Conditions for the Magnetic Helmholtz Equation
p. 171-178
On Changes of Variable Preserving the Convergence and Absolute Convergence of Fourier Series in the Haar Wavelet System
p. 179-189
On Dominated Extension of Linear Operators
p. 190-199
2-Colorings of Hypergraphs with Large Girth
p. 200-214
Finite Groups with~$\mathfrak F$-Subnormal Subgroups
p. 215-223
Completely Decomposable Quotient Divisible Abelian Groups with Isomorphic Endomorphism Semigroups
p. 224-235
On the Fourier--Walsh Transform of Functions from Dyadic Dini--Lipschitz Classes on the Semiaxis
p. 236-251
A Banach Lattice Having the Approximation Property, but not Having the Bounded Approximation Property
p. 252-259
Homogenization Estimates of Nondivergence Elliptic Operators of Second Order
p. 260-284
A Factorization Problem on a Smooth Two-Dimensional Surface
p. 285-290
Invertibility of Multidimensional Integral Operators with Bihomogeneous Kernels
p. 291-295
Universal Fourier Series
p. 296-299
On an Initialization Problem
p. 300-305
Geodesic Maps ``in the Large'' of Ricci-Flat Spaces with~$n$ Complete Geodesic Lines
p. 306-310
Modulus Estimates on Abstract Surfaces over a Domain of Revolution and a Cylindrical Ring
p. 311-315
Unique Continuation of Solutions of Second-Order Quasi-Elliptic Equations
p. 316-320

Sommaire du Fascicule no. 3

Characterization of Sets with Continuous Metric Projection in the Space~$\ell^\infty_n$
p. 323-333
Lagrangian Manifolds and Efficient Short-Wave Asymptotics in a Neighborhood of a Caustic Cusp
p. 334-359
The Liouville Equation as a Hamiltonian System
p. 360-365
On a Theorem of Matiyasevich
p. 366-379
On the Passage to the Limit in the Construction of Geometric Solutions of the Riemann Problem
p. 380-396
Minimal Contact Circuits for Symmetric Threshold Functions
p. 397-411
The Equations of Dirac and Maxwell as a Result of Combining Minkowski Space and the Space of Orientations into Seven-Dimensional Space-Time
p. 412-427
On the Normality of $\mathfrak F^{\omega}$-Abnormal Maximal Subgroups of Finite Groups
p. 428-440
The Geometry of a Singular Set of Hypersurfaces and the Eikonal Equation
p. 441-451
The Stereotype Approximation Property for the Algebras~$\mathcal C(M)$ of Continuous Functions on Metric Spaces
p. 452-456
Self-Adjointness and Discreteness of the Spectrum of Block Jacobi Matrices
p. 457-462
Speed of Convergence of Chernoff Approximations to Solutions of Evolution Equations
p. 463-468
Diffraction Approach in the Scattering Problem for Three Charged Quantum Particles
p. 469-473
The Topology of Symplectic Partially Hyperbolic Automorphisms of the 4-Torus
p. 474-476
Solutions with Substance Decay in Pressureless Gas Dynamics Systems
p. 477-480

Sommaire du Fascicule no. 4

Two-Sided Estimates of the $L^\infty$-Norm of the Sum of a Sine Series with Monotone Coefficients~$\{b_k\}$ via the $\ell^\infty$-Norm of the Sequence~$\{kb_k\}$
p. 483-489
Spectral Analysis of Operator Polynomials and Second-Order Differential Operators
p. 490-506
Multiplicative Estimates for Derivatives on a Domain
p. 507-514
Accelerated and Unaccelerated Stochastic Gradient Descent in Model Generality
p. 515-528
On the Solvability of Riemann Problems in Grand Hardy Classes
p. 529-546
On Zeros of Sums of Cosines
p. 547-551
Inverse Subsemigroups of the Bicyclic Semigroup
p. 552-560
On Popular Sums and Differences for Sets with Small Multiplicative Doubling
p. 561-571
On Rational Approximation of Markov Functions by Partial Sums of Fourier Series on a Chebyshev--Markov System
p. 572-587
Distribution of Zeros of Exponential-Type Entire Functions with Constraints on Growth along a Line
p. 588-600
Localized Asymptotic Solution of a Variable-Velocity Wave Equation on the Simplest Decorated Graph with Initial Conditions on a Surface
p. 601-616
Periodic Besov Spaces and Generalized Moduli of Smoothness
p. 617-621
An Explicit Formula for the Number of Labeled Series-Parallel $k$-Cyclic Blocks
p. 622-624
Extremal Values of Moments of Nonnegative Polynomials
p. 625-628
On the Equality Relation Modulo a Countable Set
p. 629-631
Integral Representation of Sums of Series Associated with Special Functions
p. 632-637
Strengthening of Landau's Theorem for Holomorphic Self-Mappings of a Disk with Fixed Points
p. 638-640

Sommaire du Fascicule no. 5

On Disjointly Homogeneous Orlicz--Lorentz Spaces
p. 643-656
On the Gradient Projection Method for Weakly Convex Functions on a Proximally Smooth Set
p. 657-668
Riesz Potential with Integrable Density in H\"older-Variable Spaces
p. 669-678
Finite Groups with Formation Subnormal Normalizers of Sylow Subgroups
p. 679-691
Collectives of Automata in Finitely Generated Groups
p. 692-701
Comparison Method for Studying Equations in Metric Spaces
p. 702-713
Extension of Functions from Isotropic Nikol'skii--Besov Spaces and Their Approximation together with Derivatives
p. 714-724
Finite 3-Subgroups in the Cremona Group of Rank 3
p. 725-749
Lyapunov Functions, Krasnosel'skii Canonical Domains, and the Existence of Poisson Bounded Solutions
p. 750-756
An Algorithm for Recognizing the Spherical Transitivity of an Initial Binary Automaton
p. 757-763
Elliptic Differential-Difference Equations in the Half-Space
p. 764-770
Local approximation by parabolic splines in the mean with large averaging intervals
p. 771-781
Remarks on the Uniform and Absolute Convergence of Orthogonal Series
p. 782-786
Dynamics of Supports of Extremal Measures in the Field of a Point Charge
p. 787-790
General Solution of a Cauchy--Riemann-Type Equation with Power-Law Singularities in Lower-Order Coefficients
p. 791-795
Conjugate Points in the Generalized Dido Problem
p. 796-798
Adian Sergey Ivanovich (obituary)
p. 799-800

Sommaire du Fascicule no. 6

Estimates of the Values of $n$-Widths of Classes of Analytic Functions in the Weight Spaces $H_{2,\gamma}(D)$
p. 803-822
Inequalities for Positive Definite Functions
p. 823-836
Preservation of the Existence of Zeros in a Family of Set-Valued Functionals and Some Consequences
p. 837-850
Additive Properties of Slowly Increasing Convex Sets
p. 851-867
On Potential Functions Associated with Eigenfunctions of the Discrete Sturm--Liouville Operator
p. 868-881
Mean Convergence of Periodic Pseudotrajectories and Invariant Measures of Dynamical Systems
p. 882-898
Coadjoint Orbits and Time-Optimal Problems for Step-$2$ Free Nilpotent Lie Groups
p. 899-910
Nonexistence of Global Weak Solutions for Evolution Equations with Fractional Laplacian
p. 911-919
Schur's Criterion for Formal Newton Series
p. 920-924
On the Analytic and Geometric Properties of Mappings in the Theory of $\mathscr Q_{q,p}$-Homeomorphisms
p. 925-929
A Metric Characteristic of Minimal Surfaces on Arbitrary Carnot Groups
p. 930-935
Local Dynamics of Chains of Van~der~Pol Coupled Systems
p. 936-940
On the Hierarchical Behavior of Solutions of the Maryland Equation in the Semiclassical Approximation
p. 941-946
Exact Dynamics of Moments and Correlation Functions for GKSL Fermionic Equations of Poisson Type
p. 947-951
Non-Abelian Groups Acting on Severi--Brauer Surfaces
p. 952-953