1. Associative Algebras with a Distributive Lattice of Subalgebras

   • A. G. Gein

   OriginalPaper 01 December 2020 Pages: 349 - 356

2. Universal Equivalence of Generalized Baumslag–Solitar Groups

   • F. A. Dudkin

   OriginalPaper 29 November 2020 Pages: 357 - 366

3. General Recursive Realizability and Basic Logic

   • A. Yu. Konovalov

   OriginalPaper 29 November 2020 Pages: 367 - 384

4. Automorphisms of a Graph With Intersection Array {nm − 1, nm− n + m − 1, n − m + 1;1, 1, nm− n + m − 1}

   • A. A. Makhnev
   • M. P. Golubyatnikov

   OriginalPaper 29 November 2020 Pages: 385 - 394

5. Axiomatizability of the Class of Subdirectly Irreducible Acts over an Abelian Group

   • A. A. Stepanova
   • D. O. Ptakhov

   OriginalPaper 29 November 2020 Pages: 395 - 403

6. Numberings in the Analytical Hierarchy

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

   COMMUNICATIONS 29 November 2020 Pages: 404 - 407

7. Constructing Punctually Categorical Semigroups

   • I. Sh. Kalimullin

   OriginalPaper 29 November 2020 Pages: 408 - 411

8. Sessions of the Seminar “Algebra i Logika”

   Announcement 29 November 2020 Pages: 412 - 414