1. Concerning P-frames, essential P-frames, and strongly zero-dimensional frames

   • Themba Dube

   OriginalPaper 21 August 2009 Article: 115

2. The quantic conuclei on quantales

   • Shengwei Han
   • Bin Zhao

   OriginalPaper 21 August 2009 Article: 97

3. All clones are centralizer clones

   • V. Trnková
   • J. Sichler

   OriginalPaper 22 August 2009 Article: 77

4. Definability in substructure orderings, I: finite semilattices

   • Jaroslav Ježek
   • Ralph McKenzie

   OriginalPaper 20 August 2009 Article: 59

5. Hereditarily finitely based monoids of extensive transformations

   • Edmond W. H. Lee

   OriginalPaper 28 August 2009 Article: 31

6. On perfect pairs for quadruples in complemented modular lattices and concepts of perfect elements

   • Christian Herrmann

   OriginalPaper 21 August 2009 Article: 1