(2017). On initial coefficient inequalities for certain new subclasses of bi-univalent functions. test, 25(3), 291-293. doi: 10.1016/j.joems.2017.04.001
. "On initial coefficient inequalities for certain new subclasses of bi-univalent functions". test, 25, 3, 2017, 291-293. doi: 10.1016/j.joems.2017.04.001
(2017). 'On initial coefficient inequalities for certain new subclasses of bi-univalent functions', test, 25(3), pp. 291-293. doi: 10.1016/j.joems.2017.04.001
On initial coefficient inequalities for certain new subclasses of bi-univalent functions. test, 2017; 25(3): 291-293. doi: 10.1016/j.joems.2017.04.001

On initial coefficient inequalities for certain new subclasses of bi-univalent functions

Journal of the Egyptian Mathematical Society
Volume 25, Issue 3, 2017, Pages 291-293    PDF (272.3 K)
DOI: 10.1016/j.joems.2017.04.001
Abstract
In the present paper, we introduce two interesting subclasses of the class of bi-univalent functions defined on the open unit disk U and obtain improved estimates on the initial coefficients |a2|, |a3| and |a4| for the functions in these subclasses.
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