Russian Mathematics (Iz. VUZ) №1, 2019

P.D.Andreev and V.V.Starostina. Normed planes in tangent cone to chord space of nonpositive curvature
H.H.Burchaev and G.Yu.Ryabykh. Approximation of non-analytic functions by analytical ones
K.P.Isaev. Representing systems of exponentials in projective limits of weighted subspaces of $A^\infty(D)$
S.G.Myslivets. On the Szeg\"o and Poisson kernels in the convex domains in $\mathbf{C}^n$
M.K.Potapov and B.V.Simonov. Nikolskii inequalities for trigonometric polynomials in different metrics
O.A.Repin. Nonlocal problem with Saigo operators for mixed type equation of the third order
S.Kh.Salikhov and M.G.Bashmakova. On irrationality measure of $\arctan \frac13$
S.N.Timergaliev and R.S.Yakushev. On the existence of solutions to spatial nonlinear boundary value problems for an arbitrary elastic inhomogeneous anisotropic body

Brief communications

P.V.Bibikov (submitted by V.V. Shurygin). On classification of polynomial Hamiltonians with nondegenerate linearly stable singular point
N.Temirgaliyev and A.Zh.Zhubanysheva. Computational (numerical) diameter in a context of general theory of a recovery