International Journal of Mathematics and Mathematical Sciences 
Volume 2004 (2004), Issue 1, Pages 45-47
doi:10.1155/S0161171204305284

Partial sums of functions of bounded turning

Jay M. Jahangiri1 and K. Farahmand2

 1Department of Mathematics, Kent State University, Burton 44021-9500, Ohio, USA
2School of Computing and Mathematics, University of Ulster, Jordanstown Campus, Newtownabbey Co. Antrim, BT37 0QB, UK
Received 26 May 2003

Abstract

We determine conditions under which the partial sums of the Libera integral operator of functions of bounded turning are also of bounded turning.