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Coefficient Inequalities for Concave Ces´aro Operator of Non-concave Analytic Functions

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Abstract (2. Language): 
In this article, we determined the coefficient inequalities for concave Cesáro operator which applied on non-concave analytic functions f (z) = P∞ n=0 an( f )zn, a0 = 0, a1 = 2 in an open unit disk U := {z : |z| < 1}. Also we discussed the univalence of this operator by using per-Schwarzian derivative.
1086-1092

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