Acta mathematica scientia,Series A ›› 2014, Vol. 34 ›› Issue (1): 150-156.

• Articles • Previous Articles     Next Articles

Hadamard Product of Finitely Order of Certain Class of Analytic Functions Defined by Subordination

 XIONG Liang-Peng, LIU Xiao-Li   

  1. School of Engineering Technology, Chengdu University of Technology, Sichuan Leshan 614007
  • Received:2012-06-07 Revised:2013-05-30 Online:2014-02-25 Published:2014-02-25
  • Supported by:

    成都理工大学工程技术学院科研发展基金(C122010003)资助.

Abstract:

Let P(A, B) denote a class of analytic functions subordinated to the function 1+Az/1-Bz, where A+B≠0, |B|≤1. The Hadamard product of finitely order of certain classes H 1H2, …, Hn is defined by H1*H2*H3*…*Hn(z)={f1*f2*f3*… fn(z): fi ∈Hi, i =1, 2, …, n, n ∈Z+}. It obtains the necessary and sufficient conditions for equality P(A1, B1)*P(A2, B2)*P(A3, B3)*…*P(An, Bn)=P(X, Y), which extends the corresponding earlier results.

Key words: Analytic function, Hadamard product, Subordination, Necessary and sufficient conditions

CLC Number: 

  • 30C45
Trendmd