Affiliation: | 1. Faculty of Mathematics, University of Regensburg, , 93053 Regensburg, Germany;2. Inria, , 54600 Villers‐lès‐Nancy, France;3. IECN, UMR 7502, Université de Lorraine, , 54506 Vandoeuvre‐lès‐Nancy, France;4. CNRS, IECN, UMR 7502, , 54506 Vandoeuvre‐lès‐Nancy, France |