Frederic Cazals holds a PhD in Theoretical Computer Science from the University of Paris VII. He is Research Director at INRIA Sophia-Antipolis Mediterranee, where he leads the Algorithms-Biology-Structure project-team. His research interests span geometric and topological modeling, scientific software development, and computational structural biology. Pierre Kornprobst holds a PhD in Mathematics from the University of Nice Sophia Antipolis. He is a researcher at INRIA Sophia-Antipolis Mediterranee. His research interest is the study of vision, from computational and biological perspectives, including image processing using partial differential equations, retina modeling, motion perception estimation and categorization.