1. Universidade Federal de Alagoas (UFAL), Instituto de Matemática, Maceió (AL), Brazil
2. Politecnico di Bari, Dipartimento di Meccanica, Matematica e Management, Via E. Orabona 4, 70125 Bari, Italy
3. EPFL, Institut de Mathématiques, Station 8, 1015 Lausanne, Switzerland
4. Friedrich-Alexander-Universität Erlangen-Nürnberg, Department of Mathematics, Chair for Dynamics, Control, Machine Learning, and Numerics (Alexander von Humboldt Professorship), Cauerstr. 11, 91058 Erlangen, Germany