Affiliation: | 1. Charles University in Prague, Faculty of Mathematics and Physics, Mathematical Institute, Sokolovská 83, 186 75 Prague 8, Czech Republic;2. Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA;3. University of Würzburg, Institute of Mathematics, Chair of Mathematics XI, Campus Hubland Nord, Emil-Fischer-Straße 40, 97074 Würzburg, Germany |