1. Alfred Lvovich Shmel’kin (12.06.1938–22.12.2015)

   News 13 September 2021 Pages: 747 - 750

2. Solution of the Problem of Equality and Conjugacy of Words in a Certain Class of Artin Groups

   • V. N. Bezverkhnii
   • N. B. Bezverkhnyaya

   OriginalPaper 12 September 2021 Pages: 751 - 764

3. The Problem of the Power Conjugacy Words in a Tree Product of Free Groups with Cyclic Amalgamation

   • V. N. Bezverkhnii
   • E. S. Logacheva

   OriginalPaper 12 September 2021 Pages: 765 - 771

4. On the Artin Semigroups

   • V. N. Bezverkhnii
   • A. E. Ustyan

   OriginalPaper 13 September 2021 Pages: 772 - 779

5. On Massive Subsets in the Space of Finitely Generated Groups of Diffeomorphisms of the Line and the Circle in the Case of C⁽¹⁾ Smoothness

   • L. A. Beklaryan

   OriginalPaper 12 September 2021 Pages: 780 - 796

6. Algebraic Geometry over Algebraic Structures. VIII. Geometric Equivalences and Special Classes of Algebraic Structures

   • E. Yu. Daniyarova
   • A. G. Myasnikov
   • V. N. Remeslennikov

   OriginalPaper 12 September 2021 Pages: 797 - 813

7. Tame and Wild Automorphisms of Differential Polynomial Algebras of Rank 2

   • B. A. Duisengaliyeva
   • A. S. Naurazbekova
   • U. U. Umirbaev

   OriginalPaper 12 September 2021 Pages: 814 - 824

8. Codimension Sequences and their Asymptotic Behavior

   • M. V. Zaicev
   • S. P. Mishchenko

   OriginalPaper 12 September 2021 Pages: 825 - 833

9. On the Cardinality of Relator Sets of Groups F/ ∏ [N_i, N_j]

   • O. V. Kulikova
   • A. Yu. Olshanskii

   OriginalPaper 12 September 2021 Pages: 834 - 838

10. Invariants of Classical Braids Valued In \( {G}_n^2 \)

    • V. O. Manturov

    OriginalPaper 12 September 2021 Pages: 839 - 845

11. Prime Radicals of Directed Pseudo-Ordered Rings

    • A. V. Mikhalev
    • E. E. Shirshova

    OriginalPaper 12 September 2021 Pages: 846 - 859

12. The Group of Quotients of the Semigroup of Invertible Nonnegative Matrices Over Local Rings

    • V. V. Nemiro

    OriginalPaper 12 September 2021 Pages: 860 - 875

13. Quasi-Simple Finite Groups of Essential Dimension 3

    • Yu. Prokhorov

    OriginalPaper 12 September 2021 Pages: 876 - 882

14. Torsion-Free Abelian Groups of Finite Rank with Marked Bases

    • A. A. Fomin

    OriginalPaper 12 September 2021 Pages: 883 - 901

15. On Elementary and Geometric Equivalence of Equational Co-Domains

    • A. N. Shevlyakov

    OriginalPaper 12 September 2021 Pages: 902 - 908

16. On Convex Directed Subgroups of Pseudo Lattice-Ordered Groups

    • E. E. Shirshova

    OriginalPaper 12 September 2021 Pages: 909 - 918

17. Randomness and Complexity in Matrix Groups

    • V. Shpilrain

    OriginalPaper 12 September 2021 Pages: 919 - 925