in this work, we obtain the fekete-szegö inequalities for the class $p_{sigma }left( lambda ,phi right) $ of bi-univalent functions. the results presented in this paper improve the recent work of prema and keerthi [11].

In this paper, we introduced and investigated starlike and convex functions of order α with respect to 2(j,k)-symmetric conjugate points and coefficient inequality for function belonging to these classes are provided . Also we obtain some convolution condition for functions belonging to this class.

Abstract The main idea of the study on coefficient problems in various classes analytic functions (univalent or nonunivalent) is to express coefficients a given class by corresponding with positive real part. Thus, functionals can be studied using inequalities known for $${\mathcal {P}}$$ P . Lemmas obtained ...

Abstract In this paper, we obtain the bounds of initial logarithmic coefficients for functions in classes $${\mathcal {S}}_S^*$$ S ? and {K}}_S$$ K which are starlike with respect to symmetric points convex points, respectiv...