Prof. Dr. Octavian Agratini is a senior researcher at Tiberiu Popoviciu Institute of Numerical Analysis, Romanian Academy, and Professor Emeritus at the Faculty of Mathematics and Computer Science of Babeş–Bolyai University, Cluj-Napoca, Romania. He obtained his MS in Numerical Analysis (1982) and a PhD in Mathematics (1995) from Babeş–Bolyai University. Prof. Agratini’s research interests include positive operators, semigroups of operators, Korovkin-type approximation theory, and positive approximation processes. Additionally, he is a member of the American Mathematical Society.

Dr. Maria Crăciun is a senior researcher at the Tiberiu Popoviciu Institute of Numerical Analysis, Romanian Academy, Cluj-Napoca, Romania. She completed her Master's degree in Numerical Analysis from Babeş-Bolyai University, Cluj-Napoca, Romania, in 1997, and obtained a PhD in Mathematical Analysis from the same university in 2005. Dr. Crăciun’s research interests include Automatic trend estimation, time series theory, and quantitative finance, numerical analysis, approximation of functions by means of linear and positive operators, and umbral calculus.