TY - JOUR AU - Algahtani, Obaid PY - 2017 TI - Estimates of initial coefficients for certain subclasses of bi-univalent functions involving quasi-subordination JO - Journal of Nonlinear Sciences and Applications SP - 1004--1011 VL - 10 IS - 3 AB - 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. SN - ISSN 2008-1901 UR - http://dx.doi.org/10.22436/jnsa.010.03.12 DO - 10.22436/jnsa.010.03.12 ID - Algahtani2017 ER -