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On a Certain Subclass of Meromorphic Functions Defined by a New Linear Differential Operator
Author(s) -
Khalid Challab,
Maslina Darus,
F. Ghanim
Publication year - 2017
Publication title -
journal of mathematical and fundamental sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.216
H-Index - 12
eISSN - 2337-5760
pISSN - 2338-5510
DOI - 10.5614/j.math.fund.sci.2017.49.3.5
Subject(s) - subclass , meromorphic function , mathematics , differential operator , differential (mechanical device) , operator (biology) , pure mathematics , mathematical analysis , physics , medicine , biology , antibody , immunology , thermodynamics , biochemistry , repressor , gene , transcription factor
In this article, a new linear differential operator I^k (L_s^a (a_l,b_m )f(z)) is defined by using the Hadamard product of the q-hypergeometric function and a function related to the Hurwitz-Lerch zeta function. By using this linear differential operator, a new subclass L_(s,a)^(k,*) (α_l,β_m;A,B,b) of meromorphic functions is defined. Some properties and characteristics of this subclass are considered. These include the coefficient inequalities, the growth and distortion properties and the radii of meromorphic starlikeness and meromorphic convexity. Finally, closure theorems and extreme points are introduced

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