Journal of Inequalities and Applications 
Volume 5 (2000), Issue 5, Pages 419-432
doi:10.1155/S1025583400000230

Argument estimates of meromorphically multivalent functions

Nak Eun Cho1 and Shigeyoshi Owa2

 1Department of Applied Mathematics, Pukyong National University, Pusan 608-737, Korea
2Department of Mathematics, Kinki University, Higashi-Osaka, Osaka 577-8502, Japan
Received 2 June 1999; Revised 24 September 1999

Abstract

The object of the present paper is to obtain some argument properties of meromorphically multivalent functions in the punctured open unit disk. We also derive the integral preserving properties in a sector.