1. Department of Mathematics, University of Leicester, United Kingdom
2. Computer Electrical and Mathematical Sciences Engineering, King Abdullah Univ. of Science and Technology (KAUST), Thuwal, Saudi Arabia; and IACM–FORTH, Heraklion, Greece
3. Division of Mathematics, University of Dundee, Scotland, United Kingdom; and Institute of Applied and Computational Mathematics – FORTH, Vassilika Vouton, Heraklion-Crete, Greece