1. Presentations of semigroup algebras of weighted trees

   • Christopher Manon

   OriginalPaper Open access 16 July 2009 Pages: 467 - 489

2. Association schemes, fusion rings, C-algebras, and reality-based algebras where all nontrivial multiplicities are equal

   • Harvey I. Blau

   OriginalPaper 18 August 2009 Pages: 491 - 499

3. Quantized Chebyshev polynomials and cluster characters with coefficients

   • G. Dupont

   OriginalPaper 18 August 2009 Pages: 501 - 532

4. Completely symmetric configurations for σ-games on grid graphs

   • Mathieu Florence
   • Frédéric Meunier

   OriginalPaper 26 August 2009 Pages: 533 - 545

5. On the hyperbolic unitary geometry

   • Kristina Altmann
   • Ralf Gramlich

   OriginalPaper 01 September 2009 Pages: 547 - 583

6. Code loops in both parities

   • Aleš Drápal
   • Petr Vojtěchovský

   OriginalPaper 24 September 2009 Pages: 585 - 611