ON A CLASS OF SAKAGUCHI FUNCTIONS RELATED TO BERNOULLI LEMNISCATE AND MODIFIED SIGMOID FUNCTION

ON A CLASS OF SAKAGUCHI FUNCTIONS RELATED TO BERNOULLI LEMNISCATE AND MODIFIED SIGMOID FUNCTION

S. O. Olatunji, H. Dutta

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Abstract

The aim of this investigation is to provide further results on a class of Sakaguchi functions related to Bernoulli Lemniscate and modied sigmoid function for the class SL(s; t;m;n). Early few coecient bounds of f(z) together with sharp inequalities for the Fekete-Szego were obtained.

Keywords

analytic functions, starlike functions, subordination, Sakaguchi functions, Bernoulli Lemniscate, modied sigmoid function, coecient bounds.