Geodesic

Sommaire du Fascicule no. 1

On the degree of the approximation of functions of several variables by linear positive operators of finite rank
p. 3-15
The asymptotics for $t\to\infty$ of the solution of the problem of the collapse of the intrusion spot in a~viscous stratified fluid
p. 16-24
Some asymptotic solutions of linearized Navier--Stokes equations
p. 25-35
Equations with constraints on the solution in free groups
p. 36-40
Averaging in perforated random domains of general type
p. 41-58
Estimation of a~complete rational trigonometric sum.~I
p. 59-67
Regularity of solutions of linear and quasilinear equations of elliptic type in divergence form
p. 68-82
Smallest polynomial nonresidue and incomplete Gaussian sums in finite fields
p. 83-88
Estimation of the spectral radius of an operator and the solvability of inverse problems for evolution equations
p. 89-94
$RD$-formulas and $W$-rings
p. 95-103
Duality of Lipschitz and Besov classes and the Stieltjes $B$-integral
p. 104-110
On the zeros of the Fourier transform of finite measure
p. 111-120
Self-conjugate normal bases of finite fields
p. 121-127
Minimization of a~nonconvex supremal functional
p. 128-132
An estimate of the curvature of the images of circles under maps given by convex univalent functions in a~disk
p. 133-137
Solvability and completeness for an electrodynamic system that is not of Kovalevskaya type
p. 138-140
Solutions that are not reducible to invariant ones, and partially invariant solutions of equations of a~stationary boundary layer
p. 140-143
Construction of a~matrix with nonnegative elements from its spectrum
p. 143-145
Quasiclassical asymptotics of the spectrum of elliptic operators in a~foliated manifold
p. 145-147
Solution of the Knaster problem for polynomials of second degree on a~two-dimensional sphere
p. 147-148
Interaction of waves of different scales in gas dynamics
p. 148-151
On the Kellogg theorem for discontinuous Green functions
p. 151-153

Sommaire du Fascicule no. 2

On exact constants in inequalities for norms of powers of linear operators in a~finite-dimensional
p. 3-14
Annihilator characterizations of Boolean rings and Boolean lattices
p. 15-24
Polynomial decomposition of Boolean functions
p. 25-29
On a~problem of Zalcman and its generalizations
p. 30-36
On the degree of rational functions of best approximation in $L_p(\mathbb R^m)$
p. 37-45
On a~group of intermediate growth that acts on a~line by homeomorphisms
p. 46-63
The approximation of analytic functions in some function spaces and the rational approximation of functions in Hardy classes
p. 64-70
On some properties of the formation of quasinilpotent groups
p. 71-77
On a~theorem of Hardy and Littlewood
p. 78-83
On a~theorem of Schauffler
p. 84-93
An optimal interpolation theorem for weighted quasi-Banach spaces~$l_p$ and for operators in Neumann--Schatten classes in Hilbert couples
p. 94-99
On the asymptotic behavior of the solution of the Neumann problem in domains with thin cross connectors
p. 100-109
On the simultaneous extension of the topology and pseudonorm of a~monoid to its semigroup ring
p. 110-113
Interpolation rational operators of Fej\'er and de la Vall\'ee-Poussin type
p. 114-121
A~generalization of a~theorem of Lie, and Jordan tops
p. 122-125
Quaternion algebras over commutative rings
p. 126-131
Pseudocharacters on semidirect products of semigroups
p. 132-139
The Poincar\'e--Bendixson theorem and compact families of solution spaces of ordinary differential equations
p. 140-144
Lower bounds for the widths of classes of periodic functions with a~bounded fractional derivative
p. 145-151
On the property of being a basis, for the eigenfunctions of a~problem on antiplanar oscillations of a~cylinder with external friction
p. 152-167
Uniform approximation of a~solution of an inverse problem by the quasireversibility method
p. 168-174
The deformation method for studying infinite-dimensional optimization problems
p. 175-176

Sommaire du Fascicule no. 3

Asymptotic behavior as $|x|\to\infty$ of steady flows in a~pipe
p. 3-14
$K$-theory of rings with idempotents
p. 15-22
Some properties of deducibility operators
p. 23-28
Projective regularizability of inverse operators
p. 29-36
On the Jackson theorem in~$L_2$ for Preiss systems
p. 37-50
Closed minimal systems in general separable Banach spaces and in~$L_p$, $1\leqslant p\infty$
p. 51-61
Spectral characteristics of elliptic solitons
p. 62-71
Cartwright-type theorems and real sets of uniqueness for entire functions of exponential type
p. 72-79
An analogue of an inequality of Kolmogorov--Markov type for ordinary differential operators
p. 80-91
Continuation of continuous functions and the metrizability of paracompact $p$-spaces
p. 92-101
An estimate for the concentration function of multiplicative functions and its applications
p. 102-113
Convergence of termwise-differentiated Fourier--Jacobi series and of expansions in the Faber--Schauder system
p. 114-120
On a~construction of commutative rings of differential operators
p. 121-130
On the convergence of the method of least squares
p. 131-143
On the quasivariety generated by a~finite $p$-group
p. 144-148
Trigonometric series with positive partial sums
p. 149-152
Differential equations with operator coefficients in Hilbert spaces
p. 153-155
On a~uniqueness theorem for holomorphic families of operators
p. 155-156
A~regularized trace of a~two-dimensional oscillator
p. 156-158
A~condition for the noncompactness of a~foliation on~$M_g^2$
p. 158-160

Sommaire du Fascicule no. 4

On Hardy and Bellman transforms of the Fourier coefficients of functions in symmetric spaces
p. 3-12
Bidegree of graph and degeneracy number
p. 13-20
Approximation by harmonic functions in the $C^1$-norm and harmonic $C^1$-content of compact subsets in $\mathbb R^n$
p. 21-30
Computation of intersection index of totally real and complex disk with common boundary in $\mathbb P^2$ and $\mathbb P^1\times\mathbb P^1$
p. 31-35
A linear first-order differential equation with ordinary and variational derivatives
p. 36-44
The Liouville property of invariant measures of completely integrable systems and the Monge--Amp\`ere equation
p. 45-52
On the uniqueness of the Dirichlet problem of the mean curvature equation
p. 53-61
An estimate of the Cauchy matrix function for the dirac system in the case of finite-gap nonperiodic potentials
p. 62-76
Ordinary differential equations with a continuous right-hand side in Fr\'echet spaces
p. 77-91
Paley--Wiener type theorems for functions analytic in tube domains
p. 92-100
Spectrum of nonlinear integral equations and the widths of function classes
p. 101-110
The Jackson theorem in $L_2$ for Christenson--Levy systems
p. 111-130
On the properties of interchange operations in classes of $(0,1)$-matrices
p. 131-141
Double-weighted estimates of integration operator for classes $\Phi(L)$
p. 142-145
On smooth functions invariant relative to groups generated by reflections
p. 146-147
A brief contribution to the question of the divisor problem
p. 148-152
Translation of eigenvalues of a dissipative bundle of operators
p. 153-155

Sommaire du Fascicule no. 5

Trajectories covering flows for branched coverings of the sphere and projective plane
p. 3-13
Semiclassical asymptotics of a model problem
p. 14-20
A description of normal extensions
p. 21-28
On a finite-dimensional variant of the method of the projection of the remote point
p. 29-34
Structure of neighborhoods of edges in planar graphs and simultaneous coloring of vertices, edges and faces
p. 35-47
Application of quantum stochastic calculus to optimal control
p. 48-56
Proof of S.\,P.~Novikov's conjecture on the semiclassical motion of an electron
p. 57-68
Solvability of the Riemann boundary-value problem on a fractal arc
p. 69-75
On the integrability of logarithmic derivatives of measures
p. 76-86
Optimal recovery of derivatives of bounded analytic and harmonic functions from inaccurate data
p. 87-97
Inverse mappings for homeomorphisms of class~BL
p. 98-101
Convergence of integrals with respect to $L_0$-valued measures
p. 102-106
Boundary properties of a multidimensional singular integral
p. 107-119
Generalized quaternion algebras
p. 120-128
On the category of $\mathcal U$-sets for series in the Walsh system
p. 129-151
Prescription of measures on functional spaces by means of numerical densities and path integrals
p. 152-157
A problem on Theonian triangles (TT)
p. 155-157
The Whitney constants are bounded by two
p. 158-160

Sommaire du Fascicule no. 6

Index of lacunarity
p. 3-10
Approximation of functions of bounded $p$-variation by means of polynomials of the Haar and Walsh systems
p. 11-21
On $(C,\alpha)$-summability almost everywhere of certain sequences
p. 22-32
Rational snakes
p. 33-40
On the intersection of convex supports of analytical functionals
p. 41-45
On the problem of embedding elements of groups in subsemigroups
p. 46-51
Sharp estimates of Fourier--Lagrange coefficients of functions of bounded variation
p. 52-62
Upper bounds for determinants of symmetric positive-definite matrices
p. 63-71
Existence of a solution to the equations of magnetohydrodynamics with helical symmetry in the tokamak approximation
p. 72-88
Necessary conditions for gyroscopic stabilization in a problem of mechanics
p. 89-96
Critical branching processes with infinite variance and increasing immigration
p. 97-107
A local integral representation of strictly plurisubharmonic functions
p. 108-115
On the best approximation of Dirichlet kernels
p. 116-121
Integral boundary problem in a layer
p. 122-129
Solvability of a boundary problem of motion of an inhomogeneous fluid
p. 130-140
Asymptotics of the solution of the Cauchy--Poisson problem in a layer of nonconstant thickness
p. 141-145
Spectrum of quasielliptic differential operators
p. 145-148
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