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Vietnam Journal of Mathematics 33:3 (2005) 319-334  Subclasses of Uniformly Starlike and Convex Functions Defined by Certain Integral Operator Maslina Darus, Aini Janteng, and Suzeini Abdul Halim Abstract.  In this paper, we consider a class of uniformly starlike functions defined by certain integral operator. We determine a sufficient condition for a function $f$ to be uniformly starlike function that is also necessary when $f$ has negative coefficients. Similar results for corresponding subclasses of uniformly convex functions are also obtained.

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