New univalence conditions for an integral operator of the class and .
Breaz, Daniel, Breaz, Nicoleta (2007)
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In a recent paper Fournier and Ruscheweyh established a theorem related to a certain functional. We extend their result differently, and then use it to obtain a precise upper bound on α so that for f analytic in |z| < 1, f(0) = f'(0) - 1 = 0 and satisfying Re{zf''(z)} > -λ, the function f is starlike.
Aouf, M.K., Shamandy, A., Mostafa, A.O., Madian, S.M. (2010)
Acta Universitatis Apulensis. Mathematics - Informatics
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