1. Endomorphisms of Semigroups of Invertible Nonnegative Matrices over Ordered Associative Rings

   • V. V. Nemiro

   OriginalPaper 22 March 2021 Pages: 181 - 187

2. Properties of Sums of Double Trigonometric Series with Multiply Monotone Coefficients

   • T. M. Vukolova
   • B. V. Simonov

   OriginalPaper 22 March 2021 Pages: 188 - 203

3. On the Computation of Approximate Solution to Ordinary Differential Equations by the Chebyshev Series Method and Estimation of Its Error

   • O. B. Arushanyan
   • S. F. Zaletkin

   OriginalPaper 22 March 2021 Pages: 204 - 208

4. Geometric Structure of Chebyshev Sets and Suns in Three-Dimensional Spaces with a Cylindrical Norm

   • A. R. Alimov

   OriginalPaper 22 March 2021 Pages: 209 - 215

5. Criterion for Substitutivity of Sturmian Palindromes and One-Dimensional Factor Dynamics

   • I. A. Reshetnikov
   • A. Ya. Kanel-Belov

   OriginalPaper 22 March 2021 Pages: 216 - 219

6. A New Formulation of a Criterion for the Minimal Logarithmic Growth Rate

   • S. A. Komkov

   OriginalPaper 22 March 2021 Pages: 220 - 221

7. Mappings Preserving Relations Definable by Linear Order

   • A. L. Semenov

   OriginalPaper 22 March 2021 Pages: 222 - 226