Yazar "Owa, Shigeyoshi" seçeneğine göre listele

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    Notes on starlike log-harmonic functions of order α
    (2013) Aydoğan, Seher Melike; Duman, Emel Yavuz; Owa, Shigeyoshi
    For log-harmonic functions f(z) = zh(z)g(z) in the open unit disk U, two subclasses H*LH(α) and G*LH(α) of S*LH(α) consisting of all starlike log-harmonic functions of order α (0 ≤ α < 1) are considered. The object of the present paper is to discuss some coefficient inequalities for h(z) and g(z).Mathematics Subject Classification: Primary 30C55, Secondary 30C45.
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    Some properties concerning close-to-convexity of certain analytic functions
    (Springer International Publishing AG, 2012) Nunokawa, Mamoru; Aydoğan, Seher Melike; Kuroki, Kazuo; Yıldız, İsmet; Owa, Shigeyoshi
    Let f(z) be an analytic function in the open unit disk D normalized with f(0) = 0 and f'(0) = 1. With the help of subordinations, for convex functions f(z) in D, the order of close-to-convexity for f(z) is discussed with some example.
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    Öğe
    Some results on a subclass of harmonic mappings of order alpha
    (Işık University Press, 2014) Varol, Dürdane; Aydoğan, Seher Melike; Owa, Shigeyoshi
    Let SH be the class of harmonic mappings defined by SH = { f = h(z) + g(z)| h(z) = z + ?? n=2 anz?, g(z) = b1z + ?? n=2 bnz?, b1 < 1 } where h(z) and g(z) are analytic. Additionally f(z) ? SH(?) ? | zh? (z) ? zg?(z) h(z) + g(z) ? 1 ? b1 1 + b1| < | 1 ? b1 1 + b1| ? ?, z ? U, 0 ? ? < 1 ? b1 1 + b1 In the present work, by considering the analyticity of the functions defined by R. M. Robinson [7], we discuss the applications to the harmonic mappings.