Upper Bound of the Third Hankel Determinant for a Subclass of Analytic Functions Connected with Sine Functions
Abstract
turning and multivalent starlike functions that are subordinate with sine function in the open unit disk E = fz : jzj < 1g : For these families our aim is to nd the bounds of Hankel determinant of order three. Further, the estimate of third order Hankel determinant for the family SL sin in this work improve the bounds which was investigated recently. Moreover, the same bounds have been investigated for 2-fold symmetric and 3-fold symmetric functions. Also we discuss H (3) determinant for the above mentioned families. 2 sin
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DOI: http://dx.doi.org/10.21015/vtm.v8i1.273
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