**About the Editors**

#### **Juan Alberto Rodr´ıguez Vel´azquez**

In 2021 Dr. Rodr´ıguez-Velazquez received a Full Professor Accreditation, in the field of science, ´ from ANECA, the Spanish National Agency for Quality Assessment and Accreditation. Since 2010, he has been an Associated Professor of Applied Mathematics at Rovira i Virgili University. Previously, he has been a lecturer at several Spanish universities, including the Polytechnic University of Catalonia, National Distance Education University, Open University of Catalonia, and Carlos III University of Madrid.

He achieved a Ph.D. Degree in Mathematical Science at the Polytechnic University of Catalonia in 1997. Since then, his main research has focused on graph theory. His current research interests include combinatorics, topology, computational complexity theory, and algorithmics, as well as applications of graph theory to complex network analysis. He has participated in several research projects, has co-authored over 125 journal articles, and has supervised 7 Ph.D. theses.

#### **Alejandro Estrada-Moreno**

In 2021, Dr. Estrada-Moreno received an Accreditation of Research granted by the Catalan University Quality Assurance Agency (AQU). Since February 2019, he has been a tenure eligible lecturer (similar to a full-time visiting professor) at Rovira i Virgili University. Previously, he worked as a postdoctoral researcher in the Internet Computing & Systems Optimization (ICSO) research group from the Open University of Catalonia.

He achieved a Ph.D. degree in Mathematical Science at the Universitat Rovira i Virgili in 2016. His current research interests focus on graph theory and combinatorics, computational complexity theory, algorithmics, analytics and operations research, and logistics and transportation. He has participated in several research projects and has co-authored 40 journal articles.
