1. Every minimal dual discriminator variety is minimal as a quasivariety

   • Xavier Caicedo
   • Miguel Campercholi
   • Diego Vaggione

   OriginalPaper 29 April 2021 Article: 36

2. Grätzer–Hofmann–Lawson–Jung–Sünderhauf duality

   • Tristan Bice

   OriginalPaper 28 April 2021 Article: 35

   

3. Diagram induced properties of congruence lattices

   • Miroslav Ploščica

   OriginalPaper 24 April 2021 Article: 34

   

4. Mal’tsev products of varieties, I

   • Tomasz Penza
   • Anna B. Romanowska

   OriginalPaper Open access 24 April 2021 Article: 33

5. Residual finiteness and related properties in monounary algebras and their direct products

   • Bill de Witt

   OriginalPaper Open access 24 April 2021 Article: 32

   

6. Duality for \(\kappa \)-additive complete atomic modal algebras

   • Yoshihito Tanaka

   OriginalPaper 20 April 2021 Article: 31

   

7. De Morgan clones and four-valued logics

   • Adam Přenosil

   OriginalPaper 16 April 2021 Article: 30

   

8. Characterizations of pseudocomplemented lattices by excluded 0-sublattices

   • Peng He
   • Xue-ping Wang

   OriginalPaper 15 April 2021 Article: 29

   

9. Finite representability of semigroups with demonic refinement

   • Robin Hirsch
   • Jaš Šemrl

   OriginalPaper Open access 06 April 2021 Article: 28

   

10. Truncations of ordered abelian groups

    • Paola D’Aquino
    • Jamshid Derakhshan
    • Angus Macintyre

    OriginalPaper Open access 06 April 2021 Article: 27

11. Three roads to complete lattices: orders, compatibility, polarity

    • Wesley H. Holliday

    Mailbox 24 March 2021 Article: 26

    

12. Embeddings of o-groups of finite archimedean rank

    • Ramiro H. Lafuente-Rodriguez

    OriginalPaper 22 March 2021 Article: 25

13. Axioms for signatures with domain and demonic composition

    • Robin Hirsch
    • Tim Stokes

    OriginalPaper 21 March 2021 Article: 24

    

14. On principal element lattices

    • Kar Ping Shum
    • Gülşen Ulucak
    • Suat Koç

    OriginalPaper 04 March 2021 Article: 23

15. Torsion theories and coverings of preordered groups

    • Marino Gran
    • Aline Michel

    OriginalPaper 19 February 2021 Article: 22

    

16. G. Czédli’s tolerance factor lattice construction and weak ordered relations

    • Sándor Radeleczki

    OriginalPaper Open access 19 February 2021 Article: 21

17. Reflections and powers of multisorted minions

    • Erkko Lehtonen
    • Reinhard Pöschel

    OriginalPaper Open access 13 February 2021 Article: 20

18. Anticommutativity and the triangular lemma

    • Michael Hoefnagel

    OriginalPaper 09 February 2021 Article: 19