1. Construction of existentially closed Abelian lattice-ordered groups using Fraïssé limits

   • Brian Wynne

   OriginalPaper 29 January 2021 Article: 18

2. The maximal class 2-groups generate the same variety

   • William Cocke
   • Dane Skabelund

   OriginalPaper 27 January 2021 Article: 17

3. Lattice-ordered pregroups are semi-distributive

   • Nick Galatos
   • Peter Jipsen
   • Adam Přenosil

   OriginalPaper 20 January 2021 Article: 16

4. Sandwiches for promise constraint satisfaction

   • Guofeng Deng
   • Ezzeddine El Sai
   • Athena Sparks

   OriginalPaper 20 January 2021 Article: 15

   

5. Characterising certain compactifications of frames with special attention to Freudenthal

   • Simo Mthethwa

   OriginalPaper 19 January 2021 Article: 14

6. Neutrabelian algebras

   • Keith A. Kearnes
   • Connor Meredith
   • Ágnes Szendrei

   OriginalPaper 18 January 2021 Article: 13

   

7. Solving a fixed number of equations over finite groups

   • Philipp Nuspl

   OriginalPaper Open access 14 January 2021 Article: 12

8. Existence of cube terms in finite algebras

   • Alexandr Kazda
   • Dmitriy Zhuk

   OriginalPaper 12 January 2021 Article: 11

   

9. Mal’cev conditions corresponding to identities for compatible reflexive relations

   • Stefano Fioravanti

   OriginalPaper Open access 12 January 2021 Article: 10

10. Invariance of projective modules in \(\mathsf {Sup}\) under self-duality

    • Javier Gutiérrez García
    • Ulrich Höhle
    • Tomasz Kubiak

    OriginalPaper 07 January 2021 Article: 9

    

11. Sufficient conditions for the finiteness of the 3-generated lattice with modular and distributive type elements among generators

    • Alexander G. Gein
    • Mikhail P. Shushpanov

    OriginalPaper 07 January 2021 Article: 8

    

12. Results in L-algebras

    • Lavinia Corina Ciungu

    OriginalPaper 04 January 2021 Article: 7

    

13. Epimorphisms in varieties of subidempotent residuated structures

    • T. Moraschini
    • J. G. Raftery
    • J. J. Wannenburg

    OriginalPaper 04 January 2021 Article: 6

    

14. Remarks about the Q-lattice of the variety of lattices

    • M. E. Adams
    • W. Dziobiak

    OriginalPaper 04 January 2021 Article: 5

    

15. The Tschantz and the alvin higher conditions are equivalent in congruence distributive varieties

    • Paolo Lipparini

    OriginalPaper Open access 23 December 2020 Article: 4

    

16. On Jónsson’s problem for groupoids of relations with operation of binary cylindrification

    • Dmitry A. Bredikhin

    OriginalPaper 16 November 2020 Article: 3

17. Lattices from graph associahedra and subalgebras of the Malvenuto–Reutenauer algebra

    • Emily Barnard
    • Thomas McConville

    OriginalPaper 12 November 2020 Article: 2

    

18. Split epimorphisms as a productive tool in Universal Algebra

    • Dominique Bourn

    OriginalPaper 10 November 2020 Article: 1