Mohamed Jleli is Full Professor of Mathematics at King Saud University, Riyadh, Saudi Arabia. He received his Ph.D. in Mathematics with the thesis entitled “Constant Mean Curvature Hypersurfaces” from the Faculty of Sciences of Paris VI, France, in 2004. His research interests include surfaces and hypersurfaces in space forms, mean curvature, nonlinear partial differential equations, nonlinear fractional calculus and nonlinear analysis, in which he has published his research articles in international journals of repute. He is on the editorial board of several international journals of mathematics.
Bessem Samet is Full Professor of Applied Mathematics at King Saud University, Riyadh, Saudi Arabia. He received his Ph.D. in Mathematics with the thesis entitled “Topological Derivative Method for Maxwell Equations and its Applications” from Paul Sabatier University, France, in 2004. His areas of research include different branches of nonlinear analysis, including functional analysis, partial differential equations, fractional calculus, etc. He has authored/co-authored more than 100 research papers in reputed journals. He is on the list of Thomson Reuters Highly Cited Researchers for the year 2021 (also for the years 2015–2017).
Calogero Vetro is Associate Professor of Mathematical Analysis at the University of Palermo, Italy, since 2005. He is also affiliated with the Department of Mathematics and Computer Science of the university. He received his Ph.D. in Engineering of Automation and Control Systems in 2004 and the Laurea Degree in Mechanical Engineering in 2000. He has taught courses in mathematical analysis, numerical analysis, numerical calculus, geomathematics, computational mathematics, operational research and optimization. He is Member of the Doctoral Collegium at the University of Palermo and acts as Referee for several scientific journals of mathematics. He is also on the editorial boards of renowned scientific journals and Guest Editor of special issues on fixed point theory and partial differential equations. His research interests include approximation, fixed point theory, functional analysis, mathematical programming, operator theory and partial differential equations. He has authored/co-authored more than 150 papers and was on the Thomson Reuters Highly Cited Researchers List from 2015–2017.