Title of article :
A NEW SUBCLASS OF BI-UNIVALENT FUNCTIONS DEFINED BY q-DERIVATIVE
Author/Authors :
TOKLU, E Department of Mathematics - Faculty of Education - Agrı Ibrahim Cecen University - Agrı, Turkey
Abstract :
In this investigation we introduce, by making use of q−derivative operator,
a new subclass which are an extension of some well-known subclasses of bi-univalent
functions. Also, we give the upper bounds for the coefficients |a2| and |a3| for the
functions belonging to this new subclass and its subclasses.
Keywords :
q−derivative , bi-univalent function , coefficient inequality , subordination
Journal title :
Turkish World Mathematical Society Journal of Applied and Engineering Mathematics
