Institution: | 1. Czech Technical University, Technical Mathematics, Karlovo náměsti 13, 121 35 Praha 2, Czech Republic;2. Czech Academy of Sciences, Institute of Mathematics, ?itná 25, 115 67 Praha 1, Czech Republic;3. Université du Sud, Toulon–Var, Mathématique, BP 20132, 83957 La Garde cedex, France |