Abstract
Abstract In this paper, we introduce and investigate three new general classes of bi-starlike and bi-convex functions of Ma–Minda type defined by the Sǎlǎgean integro-differential operator. Bounds of the first three coefficients | a 2 | {\lvert a_{2}\rvert} , | a 3 | {\lvert a_{3}\rvert} and | a 4 | {\lvert a_{4}\rvert} are given.
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