This article introduces the F-classes of the convex, starlike and close-to-convex classes of univalent functions. The paper also extends the theory of differential subordinations to F-differential subordinations and presents examples of these new concepts.

中文翻译：

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单价函数的F类和F微分从属

本文介绍了单价函数的凸，星形和接近凸类的F类。本文还将微分从属理论扩展到F-微分从属，并提供了这些新概念的示例。