1. OSIRIS Department, EDF R&D, Palaiseau, France
2. Postgraduate Program in Mathematics, Federal University of Paraná, Curitiba, Brazil
3. Institute of Mathematics, Statistics, and Scientific Computing, State University of Campinas (IMECC – UNICAMP), Campinas, Brazil
4. Unité de Mathématiques Appliquées (UMA), Ensta Paris, Palaiseau Cedex, France