Authors
Flavio Perissinotto
Department of Mathematics, University of Luxembourg, Esch-sur-Alzette, Luxembourg
Antonella Perucca
Department of Mathematics, University of Luxembourg, Esch-sur-Alzette, Luxembourg
© 2022 Flavio Perissinotto, Antonella Perucca, published by Slovak Academy of Sciences, Mathematical Institute
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.