International Journal of Mathematics and Mathematical Sciences
Volume 4 (1981), Issue 2, Pages 337-351
doi:10.1155/S0161171281000203

Spiral like integral operators

Abstract

In this paper we investigate the Robertson-Libera integral operators for the class of spiral like univalent and analytic functions. We find that special types of transformations preserve the class property. Our results generalize or sharpen the results recently obtained by Miller et al [7] and by Causey and White [3].