Affiliation: | (1) Department of Applied Mathematics, Charles University, Malostranské nám. 25, 118 00 Prague, Czech Republic;(2) Institute for Theoretical Computer Science, Charles University, Malostranské nám. 25, 118 00 Prague, Czech Republic;(3) Department of Mathematical Analysis, Charles University, Sokolovská 83, 186 75 Prague Czech, Republic;(4) Department of Applied Mathematics, Charles University, Malostranské nám. 25, 118 00 Prague, Czech Republic |