International Journal of Mathematics and Mathematical Sciences 
Volume 21 (1998), Issue 2, Pages 369-374
doi:10.1155/S0161171298000507

Angular estimations of certain integral operators

Nak Eun Cho, In Hwa Kim, and Ji A Kim

Department of Applied Mathematics, Pukyong National University, Pusan 608-737, Korea

Received 1 April 1996; Revised 30 September 1996

Abstract

The object of the present paper is to derive some argument properties of certain integral operators. Our results contain some interesting corollaries as the special cases.