Research Interests, Editorial Activities, Citations and Projects            

Research Interests:

• Orthogonal Polynomials, Orthogonal Systems and Special Functions 
• Interpolation, Quadrature Processes and Integral Equations
• Approximations by Polynomials, Splines and Linear Operators
• Numerical and Optimization Methods
• Polynomials (Extremal Problems, Inequalities, Zeros)
• Iterative Processes and Inequalities

Editorial Activities:

• Editor-in-Chief  Publ. Inst. Math. (Beograd) (N.S.) Institut Mathématique. Publications. Nouvelle Série. Inst. Math., Belgrade, ISSN 0350-1302; 
• Editor-in-Chief  Bull. Cl. Sci. Math. Nat. Sci. Math. Bulletin, Classe des Sciences Mathématiques et Naturelles, Sciences mathématiques, Serbian Academy of Sciences and Arts, Belgrade, ISSN 0561-7332; 
• Member of Editorial Board for Axioms. MDPI, St. Alban-Anlage 66, 4052 Basel, Switzerland,  ISSN 2075-16800 (electronic version; open access); 
• Editor-in-Chief J. Inequal. Appl. Journal of Inequalities and Applications. Springer, ISSN 1029-242X (electronic version; open access); 
• Associate Editor of  Appl. Math. Comput. Applied Mathematics and Computation. Elsevier, Inc., New York, USA, ISSN 0096-3003; 
• Associate Editor of  Optim. Letters. Optimization Letters. Springer, ISSN 1862-4472 (print version), ISSN 1862-4480 (electronic version); 
• Member of Editorial Board for FILOMAT (Formerly: Zb. Rad.).  Faculty of Sciences and Mathematics, University of Niš, Niš, ISSN 0354-5180;
• Member of Editorial Board for Appl. Anal. Discrete Math. Applicable Analysis and Discrete Mathematics (Formerly: Univ. Beograd. Publ. Elektrotehn. Fak. Ser. Mat.)  University of  Belgrade and Academic Mind, Belgrade, ISSN 1452-8630;
• Member of Editorial Board of  Facta Univ. Ser. Math. Inform. Facta Universitatis. Series: Mathematics and Informatics. University of Niš, Niš, ISSN 0352-9665 [Founder and Editor-in-Chief in the period 1986-2008];
• Editor of  JIPAM. J. Inequal. Pure Appl. Math. JIPAM. Journal of Inequalities in Pure and Applied Mathematics. Vic. Univ. Technol., Melbourne, Australia, ISSN 1443-5756; 
• Member of Advisory Board for Banach J. Math. Anal. Banach Journal of Mathematical Analysis. An International Open Access Electronic & ISI Journal, Mashhad, Iran, ISSN 1735-8787 [2007 – 2010];
• Member of Advisory Board for Ann. Funct. Anal. Annals of Functional Analysis. An International Open Access Electronic Journal, Mashhad, Iran, ISSN 2008-8752;
• Member of Editorial Board for East J. Approx. East Journal on Approximations. Darba, Sofia, Bulgaria, ISSN 1310-6236;
• Member of Editorial Board for Math. Balkanica. (N.S.). Mathematica Balkanica. New Series. Bulgar. Acad. Sci., Sofia, Bulgaria, ISSN 0205-3217;
• Member of Editorial Board for Armenian J. Math. Armenian Journal of Mathematics. Electronic Open Access Publication of the National Academy of Sciences of Armenia, Yerevan, Armenia,  ISSN 1829-1163;
• Member of Editorial Board for J. Numer. Anal. Approx. Theory. Journal of Numerical Analysis and Approximation Theory. Ed. Acad. Romane, Bucharest, Romania,  ISSN 2457-6794;
• Member of Editorial Board for Studia Univ. Babeş-Bolyai Math. Studia Universitatis Babeş-Bolyai Mathematica. Univ. "Babeş-Bolyai", Cluj-Napoca,  Romania, ISSN 0252-1938;
• Member of Editorial Board for Novi Sad J. Math. Novi Sad Journal of Mathematics. (Formerly: Univ. u Novom Sadu Zb. Rad. Prirod.-Mat. Fak. Ser. Mat.). Univ. Novi Sad, Novi Sad,  ISSN 0352-0900;
• Member of Editorial Board for Yugosl. J. Oper. Res. Yugoslav Journal of Operations Research. Univ. Belgrade, Belgrade, ISSN 0354-0243;
• Member of Editorial Board for Kragujevac J. Math. Kragujevac Journal of Mathematics. (Formerly: Zb. Rad. (Kragujevac)). Institute of Mathematics, Faculty of Science, University of Kragujevac, Kragujevac, ISSN 1450-9628.