1. Lower Central Series of Baumslag–Solitar Groups

   • V. G. Bardakov
   • M. V. Neshchadim

   OriginalPaper 26 November 2020 Pages: 281 - 294

2. Algebras of Binary Formulas for Compositions of Theories

   • D. Yu. Emel’yanov
   • B. Sh. Kulpeshov
   • S. V. Sudoplatov

   OriginalPaper 26 November 2020 Pages: 295 - 312

3. Intersections of Nilpotent Subgroups in Finite Groups with Sporadic Socle

   • V. I. Zenkov

   OriginalPaper 26 November 2020 Pages: 313 - 321

4. The Largest Moore Graph and a Distance-Regular Graph with Intersection Array {55, 54, 2; 1, 1, 54}

   • A. A. Makhnev
   • D. V. Paduchikh

   OriginalPaper 26 November 2020 Pages: 322 - 327

5. Minimal Predicates for Δ-Definability

   • A. S. Morozov
   • D. A. Tussupov

   OriginalPaper 26 November 2020 Pages: 328 - 340

6. Multi-Switches, Representations of Virtual Braids, and Invariants of Virtual Links

   • V. G. Bardakov
   • T. R. Nasybullov

   COMMUNICATIONS 26 November 2020 Pages: 341 - 345

7. Sessions of the Seminar “Algebra i Logika”

   Announcement 26 November 2020 Pages: 346 - 348