Gheorghe Bocsan - Department of Mathematics, West University of Timisoara, Bd. V. Parvan 4, 300223, Timisoara, Romania. Gheorghe Constantin - Department of Mathematics, West University of Timisoara, Bd. V. Parvan 4, 300223, Timisoara, Romania.
This year, in August, Professor Viorel Radu would have celebrated his 65th birthday. We dedicate this special issue to him, in appreciation of his many contributions to Mathematics. The main research interests of Professor Viorel Radu have been Fixed Point Theory, Probabilistic Anal- ysis and Elementary Mathematics. He was a founder and main collaborator of the research group of the Seminar of Probabilistic Metric Spaces (after 1980, the Seminar of Probability Theory and Applications) at the West University of Timisoara, with a series of pre-prints spanning more than 160 volumes, and 4 mono- graphs. Out of these, Professor Radu was author or co-author of 46 research papers and the monograph "Lectures on Probabilistic Analysis" (1994). The name of Professor Viorel Radu is also strongly related to the "Traian Lalescu" Inter-County Math- ematics competition: he was the coordinator of a series of booklets of tests and commented problems, and the author of two books on elementary mathematics. Throughout the years of scientific research activity Professor Radu obtained many significant results, among which we mention: the characterization of continuous triangular norms having the fixed point prop- erty for contractions of Sehgal type, a Banach-type theorem for Hicks contractions, new classes of contractive mappings in probabilistic and fuzzy metric spaces, formulae for metrics of Frechet and Ky Fan type gen- erated by probabilistic metrics, Levy metrics for distribution functions, and the development of the fixed point method in the theory of Ulam - Hyers stability for functional equations. He was author or co-author to many research papers in journals of high scientific value, papers which had a great impact in their field. He also published 3 volumes of lecture notes together with collaborators from the West University of Timisoara, and the celebrated monograph "On nonsymmetric topological and probabilistic structures" with Y. J. Cho and M. Grabiec (Nova Science Publishers, New York, 2006). To all those who have had the opportunity to know Professor Viorel Radu, he is an example of dedication and commitment. He will remain in our memory as a mentor, colleague, remarkable mathematician and a great human being
Gheorghe Bocsan, Gheorghe Constantin, In memoriam Professor Viorel Radu (1947-2011), Journal of Nonlinear Sciences and Applications, 6 (2013), no. 1, 1-1
Bocsan Gheorghe, Constantin Gheorghe, In memoriam Professor Viorel Radu (1947-2011). J. Nonlinear Sci. Appl. (2013); 6(1):1-1
Bocsan, Gheorghe, Constantin, Gheorghe. "In memoriam Professor Viorel Radu (1947-2011)." Journal of Nonlinear Sciences and Applications, 6, no. 1 (2013): 1-1