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On H3(1)H3(1) Hankel determinant for concave univalent functions


S¸ AHSENE ALTINKAYA, SIBEL YALC¸ IN


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abs_cmi_2016_25_11-14v1

In this paper we study the class C0(α) (α ∈ (1, 2]) – the class of the so-called concave univalent functions. The main aim is to obtain an upper bound to the third Hankel determinant for concave univalent functions.