On Certain Classes of Convex Functions

On Certain Classes of Convex Functions
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DOI:
10.1155/2013/294378
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发表时间:
2013-05
期刊:
Int. J. Math. Math. Sci.
影响因子:
--
通讯作者:
Y. J. Sim;O. S. Kwon
Y. J. Sim;O. S. Kwon
中科院分区:
其他
文献类型:
--
作者:
Y. J. Sim;O. S. Kwon

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对于真实的数及使得满足以下双边不等式的正规化解析函数类:其中表示开单位圆。我们发现一些关系涉及类中的函数。我们估计了这类函数的系数的界,并解决了这类函数的Fekete-Szego问题。此外,我们还研究了反函数或双单叶函数的初始系数的界。
For real numbers and such that , we denote by the class of normalized analytic functions which satisfy the following two sided-inequality: where denotes the open unit disk. We find some relationships involving functions in the class . And we estimate the bounds of coefficients and solve the Fekete-Szego problem for functions in this class. Furthermore, we investigate the bounds of initial coefficients of inverse functions or biunivalent functions.