Institution: | a INRIA-SAGEP, UFR Scientifique, Université de Metz, Ile du Saulcy, 57045 Metz, France b Omsk Branch of Sobolev Institute of Mathematics SB RAS, Pevtsov street 13, 644099 Omsk, Russia c Department of Mathematics, Omsk State University, Mira prospect 55A, 644077 Omsk, Russia d Omsk Branch of Sobolev Institute of Mathematics SB RAS, Pevtsov street 13, 644099 Omsk, Russia e Department of Mathematics and Computer Science, TU Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands |