Differential Posets and Smith Normal Forms Alexander MillerVictor Reiner OriginalPaper 30 July 2009 Pages: 197 - 228
On the Complexity of Cover-Incomparability Graphs of Posets Jana MaxováPavla PavlíkováDaniel Turzík OriginalPaper 11 July 2009 Pages: 229 - 236
Orders on Subsets Rationalised by Abstract Convex Geometries Walter BossertMatthew J. RyanArkadii Slinko OriginalPaper 08 July 2009 Pages: 237 - 244
Conditions for Permutability of Congruences in Implication Algebras Diego N. CastañoJosé Patricio Díaz Varela OriginalPaper 15 July 2009 Pages: 245 - 254
Unified Representability of Total Preorders and Interval Orders through a Single Function: The Lattice Approach Gianni BosiJavier Gutiérrez GarcíaEsteban Induráin OriginalPaper 21 July 2009 Pages: 255 - 275
Inductive Characterizations of Finite Interval Orders and Semiorders Jimmy LebletJean-Xavier Rampon OriginalPaper 18 July 2009 Pages: 277 - 281