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解析函数族的近于凸性 被引量:1

Close-to-convexity of certain analytic functions
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摘要 鉴于先前Owa得到的解析函数f(z)=z+∑n=2anzn,(z∈U)属于近于凸函数族C(α)(0≤α<1)的一些充分条件,主要目的是找出函数f(z)属于新定义的近于凸函数族C1(α)(α>1)的某些充分条件. Owa had obtained several sufficient conditions for the close-to-convex class C(a)(0≤n〈1) of analytic functios f(z)=z+∑x-2 ∞ anz^n,(z∈U) long before. On the base of those, the main object of the present paper was to derive certain sufficient conditions for the new defined close-toconvex class C1 (a) (a〉1)of the functions f(z).
作者 郝小娜
出处 《湖北大学学报(自然科学版)》 CAS 北大核心 2011年第3期336-339,共4页 Journal of Hubei University:Natural Science
关键词 解析函数 单叶函数 从属原理 星形函数 凸函数 近于凸函数 analytic functiom univalent function subordination principle starlike functiomconvex function close-to-convex function
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参考文献4

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同被引文献17

  • 1Darwish H E, Magesh N. On certain subclasses of multivalent analytic functions involving the catas operator [J].Acta Universitatis Apulensis, 2013,36: 209-224.
  • 2Owa S. Some properties of certain muhivalent functions [ J ]. Appl Math Lett, 1991,4 (5) : 79-83.
  • 3Patil D A, Thakare N K. On convex hulls and extreme points of p-valent starlike and convex classes with applications [J]. Bull Math Soc Sci Math, 1983,27(2) : 145-160.
  • 4Bharati R, Parvatham R, Swaminathan A. On subclasses of uniformly convex functions and corresponding class of starlike functions[J]. Tamkang J Math, 1997,28(1 ) : 17-32.
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  • 6Kanas S,Wisniowska A. Conic regions and k-uniform convexity[J].J Comput Appl Math, 1999, 105( 1 ) : 327-336.
  • 7Nishiwaki J, Owa S. Certain classes of analytic functions concerned with uniformly starlike and convex functions [J]. Appl Math Comput, 2007,187 : 350-355.
  • 8Catas A.On certain classes of p-valent functions defined by multiplier transform presented paper [C]. Proceedings of the International Symposium on Geometric Function Theory and Applications, Istanbul, Turkey, 2007.
  • 9Acu M, Owa S. Note on a class of starlike functions [C].Proceedings of the International Short Joint Work on Study on Calculus Operators in Univalent Functions Theory, Kyoto, Japan, 2006.
  • 10A1-Oboudi F M. On univalent functions defined by a generalized Salagean operator [ J ]. Int J Math Math Sci, 2004,25 : 1429- 1436.

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