Preface

The 13th ERCOFTAC Workshop, hosted by the In- stitute of Fluid Mechanics and Heat Transfer at Graz University of Technology, Austria, was held on 25th and 26th September, 2008..

Raimund Kirner, University of Herdfordshire, UK Philip Langer, Vienna University of Technology, Austria Stefano Marrone, Second University of Naples, Italy Raffaela

Matteo Baldoni University of Torino, Italy Federico Chesani University of Bologna, Italy Bernardo Magnini Fondazione Bruno Kessler, Italy Paola Mello University of Bologna, Italy

McGuinness, Stanford University, USA Valeria de Paiva, Palo Alto Research Center, USA Guilin Qi, University of Karlsruhe, Germany Luciano Serafini, Fondazione Bruno Kessler,

– Berardina Nadja De Carolis,University of Bari – Mauro Dragoni, Fondazione Bruno Kessler – Alessandro Lenci, University of Pisa – Alessandro Mazzei, University of Turin.

Queensland University of Technology, Australia Eindhoven University of Technology, Netherlands University of Vienna, Austria. IST/INESC-ID, Portugal University of Trento,

• Rachele Sprugnoli (University of Trento, Fondazione Bruno Kessler, Italy). • Stephanie Wulff (University of

Tal quale come nella teoria delle funzioni vien qui chiamato aperto un insieme parziale U di uno spazio euclideo, se ogni punto di U è centro di una