1. Direct Sum of Distributive Lattices on the Perfect Matchings of a Plane Bipartite Graph

   • Heping Zhang

   OriginalPaper 06 February 2010 Pages: 101 - 113

2. Definability in Substructure Orderings, II: Finite Ordered Sets

   • Jaroslav Ježek
   • Ralph McKenzie

   OriginalPaper 23 January 2010 Pages: 115 - 145

3. Residuated Lattices of Size ≤ 12

   • Radim Belohlavek
   • Vilem Vychodil

   OriginalPaper 05 February 2010 Pages: 147 - 161

4. Triangle, Parallelogram, and Trapezoid Orders

   • Kenneth P. Bogart
   • Joshua Douglass Laison
   • Stephen P. Ryan

   OriginalPaper 27 April 2010 Pages: 163 - 175

5. Quantum Logic in Dagger Kernel Categories

   • Chris Heunen
   • Bart Jacobs

   OriginalPaper Open access 17 February 2010 Pages: 177 - 212

6. The Geometry of Relations

   • Elias Gabriel Minian

   OriginalPaper 23 February 2010 Pages: 213 - 224

7. Constructive Pointfree Topology Eliminates Non-constructive Representation Theorems from Riesz Space Theory

   • Bas Spitters

   OriginalPaper Open access 10 March 2010 Pages: 225 - 233

8. Projections in a Synaptic Algebra

   • David J. Foulis
   • Sylvia Pulmannová

   OriginalPaper 02 March 2010 Pages: 235 - 257