1. Institute of Applied Mathematics Leibniz University of Hannover Welfengarten 1 Hannover 30167 Germany
2. Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering ‐ Innovation Across Disciplines) Leibniz Universität Hannover Hannover Germany
3. Department of Applied Mathematics, Faculty of Mathematical Sciences Tarbiat Modares University Tehran Iran