2004
DOI: 10.1524/anly.2004.24.14.71
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Two Parameter Families of Close-to-Convex Functions and Convolution Theorems

Abstract: Using a recently obtained coefficient condition for functions with positive real part by M. Obradovic and S. Ponnusamy, we construct four different useful examples of two parameter families of close-to-convex functions. As a consequence of another well-known coefficient condition due to M. Obradovic and S. Ponnusamy, we obtain a number of results concerning the convolution of two univalent functions. Using these results, we obtain criteria for combinations of hypergeometric functions to be univalent.

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