1. Implicit definition of the quaternary discriminator

   • Miguel A. Campercholi
   • Diego J. Vaggione

   OriginalPaper 11 September 2012 Pages: 1 - 16

2. Isotone maps on lattices

   • G. M. Bergman
   • G. Grätzer

   OriginalPaper 15 July 2012 Pages: 17 - 37

3. Birkhoff’s variety theorem in many sorts

   • Jiří Adámek
   • Jiří Rosický
   • Enrico M. Vitale

   OriginalPaper 07 April 2012 Pages: 39 - 42

4. Preservation of Sahlqvist fixed point equations in completions of relativized fixed point Boolean algebras with operators

   • Nick Bezhanishvili
   • Ian Hodkinson

   OriginalPaper 07 August 2012 Pages: 43 - 56

5. Downward closure of depth in countable Boolean algebras

   • Asher M. Kach
   • Steffen Lempp

   OriginalPaper 12 July 2012 Pages: 57 - 74

6. Coset laws for categorical skew lattices

   • João Pita Costa

   OriginalPaper 09 August 2012 Pages: 75 - 89

7. Various disconnectivities of spaces and projectabilities of ℓ-groups

   • Ricardo E. Carrera

   OriginalPaper 07 August 2012 Pages: 91 - 109

8. An algebraic closure for barycentric algebras and convex sets

   • Gábor Czédli
   • A. B. Romanowska

   OriginalPaper 07 August 2012 Pages: 111 - 143

9. Periodic lattice-ordered pregroups are distributive

   • Nikolaos Galatos
   • Peter Jipsen

   OriginalPaper 07 August 2012 Pages: 145 - 150

10. Functionally dense relation algebras

    • Hajnal Andréka
    • Steven Givant

    OriginalPaper 07 August 2012 Pages: 151 - 191