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    STUDIA MATHEMATICA - Issue no. 2 / 2009  
         
  Article:   ON SUBCLASSES OF PRESTARLIKE FUNCTIONS WITH NEGATIVE COEFFICIENTS.

Authors:  SANTOSH B. JOSHI.
 
       
         
  Abstract:  The present paper is aim at defining new subclasses of prestarlike functions with negative coefficients in unit disc U and study there basic properties such as coefficient estimates, closure properties. Further distortion theorem involving generalized fractional calculus operator for functions f(z) belonging to these subclasses are also established.

Key words and phrases: Prestarlike function, distortion theorem, closure properties, extremal function, fractional calculus.

 
         
     
         
         
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