1. Minimal Equivalence Relations in Hyperarithmetical and Analytical Hierarchies

   • N. A. Bazhenov
   • M. Mustafa
   • M. M. Yamaleev

   OriginalPaper 13 July 2020 Pages: 145 - 150

2. On Weakly Negative Subcategories, Weight Structures, and (Weakly) Approximable Triangulated Categories

   • M. V. Bondarko
   • S. V. Vostokov

   OriginalPaper 13 July 2020 Pages: 151 - 159

3. On Algebras of Relations with Operations of Left and Right Reflexive Product

   • D. A. Bredikhin

   OriginalPaper 13 July 2020 Pages: 160 - 167

4. On Undecidability of Concatenation Theory for One-Symbol Languages

   • S. M. Dudakov

   OriginalPaper 13 July 2020 Pages: 168 - 175

5. Word and Conjugacy Problems in Groups \(\boldsymbol{G}_{\boldsymbol{k+1}}^{\boldsymbol{k}}\)

   • D. A. Fedoseev
   • A. B. Karpov
   • V. O. Manturov

   OriginalPaper 13 July 2020 Pages: 176 - 193

   

6. Latin Squares over Quasigroups

   • A. V. Galatenko
   • V. A. Nosov
   • A. E. Pankratiev

   OriginalPaper 13 July 2020 Pages: 194 - 203

7. Remarks on NQ-Critical Commutative Unary Algebras

   • V. K. Kartashov
   • A. V. Kartashova

   OriginalPaper 13 July 2020 Pages: 204 - 206

8. Commutative Unary Algebras with Join-Semidistributive Topology Lattices

   • A. V. Kartashova

   OriginalPaper 13 July 2020 Pages: 207 - 213

9. Abstract Characterization of Input Symbol Semigroups of Universal Hypergraphic Automata

   • E. V. Khvorostukhina
   • V. A. Molchanov

   OriginalPaper 13 July 2020 Pages: 214 - 226

10. \(\boldsymbol{P}\)-Combinations of Ordered Theories

    • B. Sh. Kulpeshov
    • S. V. Sudoplatov

    OriginalPaper 13 July 2020 Pages: 227 - 237

11. Global Deformations of a Lie Algebra of Type \(\bar{\boldsymbol{A}}_{\mathbf{5}}\) in Characteristic 2

    • M. I. Kuznetsov
    • N. G. Chebochko

    OriginalPaper 13 July 2020 Pages: 238 - 242

12. Multi-Agent Logics with Multi-Valuations and Intensional Logical Operations

    • V. V. Rybakov

    OriginalPaper 13 July 2020 Pages: 243 - 251

13. On Degree Spectra of Topological Spaces

    • V. L. Selivanov

    OriginalPaper 13 July 2020 Pages: 252 - 259

14. To the Question of the Root-Class Residuality of Free Constructions of Groups

    • E. V. Sokolov
    • E. A. Tumanova

    OriginalPaper 13 July 2020 Pages: 260 - 272

15. On the Directions of \(\boldsymbol{\omega}\)-Fibered and \(\boldsymbol{\Omega}\)-Foliated Formations and Fitting Classes of Finite Groups

    • M. M. Sorokina
    • S. P. Maksakov

    OriginalPaper 13 July 2020 Pages: 273 - 279

16. Centrally Essential Rings

    • A. A. Tuganbaev

    OriginalPaper 13 July 2020 Pages: 280 - 288