Advances in Summability and Approximation Theory

S. A. MOHIUDDINE is Full Professor of Mathematics at King Abdulaziz University, Jeddah, Saudi Arabia. An active researcher, Professor Mohiuddine has coauthored one book,
Convergence Methods for Double Sequences and Applications
(Springer, 2014), and a number of book chapters, and has contributed over 120 research papers to various leading journals. He is a referee for several scientific journals and on the editorial board of numerous scientific journals, international scientific bodies and organizing committees. He has visited several international universities including Imperial College, London, UK. Professor Mohiuddine was a guest editor of a number of special issues for
Abstract and Applied Analysis
,
Journal of Function Spaces
and
Scientific World Journal
. His main research interests are in the field of functional analysis, sequence spaces, statistical convergence, matrix transformation, measures of noncompactness and approximation theory. 

TUNCER ACAR is Associate Professor at the Department of Mathematics, Faculty of Science, Selçuk University, Turkey. He previously worked at the Department of Mathematics and Statistics, the University of Alberta, Canada, as a visiting scholar in 2013 and 2014. He joined the Department of Mathematics, Faculty of Science, Kirikkale University, as a research assistant in 2009. He received his Master of Science degree in 2011, and Ph.D. degree in 2015, from the same university. Born in Amasya, Turkey, in 1985, Dr Acar is graduated from  Ataturk University, in 2008. He has studied approximation by linear positive operators and published about 40 papers.