Geodesic

Sommaire du Fascicule no. 1

Summation of analytic functions
p. 3-10
Upper bounds for the best one-sided approximation by splines of the classes $W^rL_1$
p. 11-17
Extremal problems in a~subclass of entire functions of finite power
p. 19-28
Best approximation of analytic functions from information about their values at a~finite number of points
p. 29-40
Integral representation of a~class of univalent functions
p. 41-48
Approximation of continuous functions by trigonometric polynomials almost everywhere
p. 49-62
Inner functions in $C^n$
p. 63-66
An expanding system of linearly closed sets
p. 67-84
Linearly ordered groups whose system of convex subgroups is central
p. 85-90
Nilpotency class of a~free group of the product of certain varieties
p. 91-98
The invertibility of the operator $d/dt+A(t)$ in the space of bounded functions
p. 99-104
Calculation of eigenvalues and eigenvectors of bounded operators by the false-perturbation method
p. 105-108
Theory of resolvable spaces
p. 109-114
Compatibly regular bases of K\"othe spaces
p. 115-122
Possible generalizations of the Minagawa--Rado Lemma on the rigidity of a~surface of revolution with a~fixed parallel
p. 123-132
Decomposition of a normal law into a convolution of functions of bounded variation
p. 133-147
Some models of combinatory logic
p. 149-154
Yanamoto Inequality and Gatherings
p. 155-160

Sommaire du Fascicule no. 2

Deviation of the centroid of a~convex figure from the center of the circumscribed disk
p. 161-164
A~necessary condition for convergence of interpolating parabolic and cubic splines
p. 165-178
An example of a~zero series expansion in the Walsh system
p. 179-186
Certain embedding theorems
p. 187-200
Proof of the method of locally conformal sewing
p. 201-210
A~uniqueness theorem for solutions to an inverse problem for the wave equation
p. 211-214
A~class of weighted spaces of entire functions
p. 215-224
Solvability of partial differential equations of infinite order in certain classes of entire functions
p. 225-236
Defining a~metric in a~linear space by means of a~family of subsets
p. 237-246
Canonical decomposition of projective and affine killing vectors on the tangent bundle
p. 247-258
Absolute bases in Hilbert space
p. 259-266
Connectedness and solar properties of sets in normed linear spaces
p. 267-278
Turnpike theorems in probabilistic models of economic dynamics
p. 279-290
The Kleinfeld identities in generalized accessible rings
p. 291-297
Some extremal problems of theory of quadrature and approximation of functions
p. 299-311

Sommaire du Fascicule no. 3

Asymptotically sharp bounds for the remainder for the best quadrature formulas for several classes of functions
p. 313-322
The order of the best one-sided approximation by polynomials and splines in the $L_p$-metric
p. 323-329
Two sufficient conditions for the univalence of analytic functions
p. 331-346
Chebyshev subspaces of vector-valued functions
p. 347-352
Direct and inverse inequalities for $\varphi$-Fej\'er mean-square approximations
p. 353-364
Direct and inverse estimates for a singular Cauchy integral along a~closed curve
p. 365-380
An estimate of the curvature of level curves in a~class of univalent functions
p. 381-388
A~system of congruences
p. 389-392
Abelian varieties in characteristic $p$
p. 393-400
Groups of automorphisms of finite $p$-groups
p. 401-418
A~group of transformations connected with the Markov cubic surface
p. 419-428
The spectra of self-adjoint extensions of a~symmetric operator
p. 429-434
Absolute convergence of Fourier series in eigenfunctions of an elliptic operator
p. 435-448
Solution of the matrix equation $AX-XB=C$
p. 449-451
Nonsingular saddle points and the absence of mixing
p. 453-468
The rigidity of mirror-like protruded surfaces
p. 469-479

Sommaire du Fascicule no. 4

The summability of a special series by the $(C,\alpha)$ method
p. 481-490
Boundary values of a convergent sequence of J-contractive matrix-functions
p. 491-500
Непрерывная зависимость элемента, реализующего минимум выпуклого функционала, от множества допустимых элементов
p. 501-512
Generalized elements of best approximation
p. 513-523
The logarithmic derivative of a~meromorphic function
p. 525-530
The continuity of the metric projection on a~subspace of finite codimension in the space of continuous functions
p. 531-539
The continuity of semiadditive functionals
p. 541-548
Bases of certain nonreflexive spaces of functions
p. 549-560
The zeros of a~Dirichlet $L$ function on the critical line
p. 561-570
Serre Lie algebras of generalized Jacobians
p. 571-576
Plane functors
p. 577-586
Modulus of continuity of the solution to the Dirichlet problem for a~second-order parabolic equation
p. 587-593
An inverse problem for an equation of parabolic type
p. 595-600
The unitary equivalence of linear operatops to integral operators
p. 601-610
Estimate for the spectrum of an operator bundle and its application to stability problems
p. 611-614
Symmetry measures
p. 615-622
The existence of some resolvable block designs with divisibility into groups
p. 623-634
Distribution of an analog of Sherman's statistics under rank-censored observations
p. 635-640
An analog of the Vitali-Hahn-Saks theorem
p. 641-652
Two close sets of bounded variation
p. 653-656

Sommaire du Fascicule no. 5

The asymptotic representation at a point of the derivative of orthonormal polynomials
p. 659-672
The representations of functions by orthogonal series possessing martingale properties
p. 673-680
The Keldysh--Sedov problem for functions holomorphic in a~bi-halfplane
p. 681-690
Approximation of Dirichlet polynomials in cases of sparse exponents
p. 691-698
The best approximation of classes $W_1^r(I^s)$ in the space $L_\infty(I^s)$
p. 699-706
The kernel of a~sequence obtained from a~given sequence with the aid of a~regular transformation
p. 707-716
2-Divisible groups over~$Z$
p. 717-726
Infinite groups satisfying the normalizer condition for nonprimary subgroups
p. 727-734
Compactness conditions for groups of automorphisms of topological groups
p. 735-743
The $\mathfrak F$-length of finite groups
p. 745-754
An example of a~locally unsolvable differential equation of quasiprincipal type with a~real-valued weighted principal symbol
p. 755-761
Differential operator with irregular splitting boundary conditions
p. 763-772
Linear differential equations with constant coefficients on arcwise-connected manifolds
p. 773-782
Generalized resolvents of symmetric operators with arbitrary defect numbers
p. 783-794
An extremal theorem of Riemannian geometry
p. 795-804
$K$-spaces of constant holomorphic sectional curvature
p. 805-814
Deformability of surfaces of positive curvature
p. 815-823

Sommaire du Fascicule no. 6

Mikhail Ivanovich Kargapolov (obituary)
p. 825-832
Semiplane lattices over irreducible groups
p. 833-842
Regular completion of modules
p. 843-851
Non-self-equivalent constructivization of atomic Boolean algebras
p. 853-858
The topological models of intuitionistic anlaysis. One counterexample
p. 859-862
Structure of continuous functions of a~completely regular space
p. 863-869
Simplest sequential search algorithm for the largest value of a~twice-differentiable function
p. 871-872
A~cyclic sum with 12 terms
p. 873-885
Convergence and summability of Fourier series
p. 887-898
Estimates of $n$-diameters of some classes of functions analytic on Riemann surfaces
p. 899-911
Exact inequalities for splines and best quadrature formulas for certain classes of functions
p. 913-926
An integral equation with a~difference kernel
p. 927-932
Asymptotic behavior of Shannon functions for the delays of schemes of functional elements
p. 939-951
Letter to editor
Errata
p. 9521-952