1. Principal congruences on pseudocomplemented semilattices

   • R. J. Bignall
   • M. Spinks

   OriginalPaper 12 February 2011 Pages: 1 - 7

2. Fixed elements in involutive residuated lattices

   • Jeffrey S. Olson

   OriginalPaper 06 February 2011 Pages: 9 - 19

3. On the prevariety of perfect lattices

   • Kira Adaricheva

   OriginalPaper 10 February 2011 Pages: 21 - 39

4. Freeoids: a semi-abstract view on endomorphism monoids of relatively free algebras

   • Jānis Cīrulis

   OriginalPaper 06 February 2011 Pages: 41 - 60

5. On the generation of clones containing near-unanimity operations

   • Sebastian Kerkhoff

   OriginalPaper 06 February 2011 Pages: 61 - 72

6. Rigidity of unary algebras and its application to the \({\mathcal {HS} = \mathcal {SH}}\) problem

   • Tomasz Brengos

   OriginalPaper Open access 10 February 2011 Pages: 73 - 89

7. Finite distributive lattices are congruence lattices of almost-geometric lattices

   • Gábor Czédli
   • E. Tamás Schmidt

   OriginalPaper 06 February 2011 Pages: 91 - 108