%0 Journal Article %T Estimates of initial coefficients for certain subclasses of bi-univalent functions involving quasi-subordination %A Algahtani, Obaid %J Journal of Nonlinear Sciences and Applications %D 2017 %V 10 %N 3 %@ ISSN 2008-1901 %F Algahtani2017 %X The object of the present paper is to introduce and investigate new subclasses of the function class \(\Sigma\) of bi-univalent functions defined in the open unit disk U, involving quasi subordination. The coefficients estimate \(|a_2|\) and \(|a_3|\) for functions in these new subclasses are also obtained. %9 journal article %R 10.22436/jnsa.010.03.12 %U http://dx.doi.org/10.22436/jnsa.010.03.12 %P 1004--1011