Biographical note

Aref Jeribi is Professor in the Department of Mathematics, University of Sfax, Tunisia. He completed his habilitation of mathematics and applications at the University of Sfax, Tunisia, in 2002, and defended his Ph.D. thesis at the University of Corsica Pasquale Paoli, France, in 1998. His research interests include spectral theory, matrix operators, transport theory, Gribov operator, Bargmann space, fixed-point theory, Riesz basis and linear relations. He is author/co-author of 11 books and has published 229 research articles in reputed journals and conference proceedings.

Najib Kaddachi is Assistant Professor in the Department of Mathematics, Faculty of Economics and Management, University of Sfax, Tunisia. He completed his habilitation of mathematics and applications in 2021, and defended his Ph.D. thesis, in 2015, at the University of Sfax, Tunisia. His research interests lie in several areas of pure and applied mathematics, ordinary and partial differential equations, integral and differential inclusion, fixed-point theory, Banach algebra, functional analysis and operator theory.