1. Institute for Analysis and Scientific Computing TU Wien Wiedner Hauptstraße 8–10 Vienna Austria
2. Faculty of Mathematics University of Vienna Oskar‐Morgenstern‐Platz 1 Wien 1090 Austria
3. Faculty of Economics University of South Bohemia Studentská 13 České Budějovice Czech Republic
4. Faculty of Information Technology Czech Technical University in Prague Thákurova 9 Prague 6 160 00 Czech Republic