Hankel determinant for the class of K(α, β)
Let f(z)=z+∑anzn be an analytic function in the open unit disc. A sharp upper bound is obtained for the functional |a2a4-a23| for the class k(α,β) of normalised close-to-convex functions defined in the open unit disc
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Penerbit Universiti Kebangsaan Malaysia
2010
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