On Multivalent Functions with Negative and Missing Coefficients |
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作者姓名: | S.M.Sarangi VijayaJ.Patil |
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作者单位: | Dept. Math.,Karnatak University,Dharwad-580 003,INDIA,Dept. Math.,Karnatak University,Dharwad-580 003,INDIA |
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摘 要: | Let P_k(p, A, B) be the class of functions f(z) = z~p-sum from n=k to ∞(|α_(n+′p|Z~((n+)~-)p) k≥2 analytic in the unit disc E={z:|z|<1} and satisfying the condition |(zf′(z)/f(z)-p)/(Ap-Bzf (z)/f(z))|<1. for z∈E and -1≤B
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