1. Free-lattice functors weakly preserve epi-pullbacks

   • H. Peter Gumm
   • Ralph S. Freese

   OriginalPaper Open access 23 April 2022 Article: 20

   

2. Varieties with existentially definable factor congruences

   • Mariana Badano
   • Miguel A. Campercholi
   • Diego J. Vaggione

   OriginalPaper 22 April 2022 Article: 19

3. Nuclear ranges in implicative semilattices

   • Marcel Erné

   OriginalPaper Open access 12 April 2022 Article: 18

   

4. Characterizing the commutator in varieties with a difference term

   • Keith A. Kearnes
   • Ágnes Szendrei
   • Ross Willard

   OriginalPaper 06 April 2022 Article: 17

   

5. Acts with identities in the congruence lattice

   • I. B. Kozhuhov
   • A. M. Pryanichnikov

   OriginalPaper 05 April 2022 Article: 16

6. Some partial results on the cancellation law for the tensor product of complete lattices

   • Shengwei Han
   • Jing Liu
   • Javier Gutiérrez García

   OriginalPaper 20 March 2022 Article: 15

7. An algebraic theory of clones

   • Antonio Bucciarelli
   • Antonino Salibra

   OriginalPaper 20 March 2022 Article: 14

8. Adjoint maps between implicative semilattices and continuity of localic maps

   • Marcel Erné
   • Jorge Picado
   • Aleš Pultr

   OriginalPaper Open access 19 March 2022 Article: 13

   

9. Canonical extensions of lattices are more than perfect

   • Andrew P. K. Craig
   • Maria J. Gouveia
   • Miroslav Haviar

   OriginalPaper 19 March 2022 Article: 12