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العنوان
Studies on Some Classes of
Analytic Functions Associated
with Certain Operators /
المؤلف
ElSayed, Ghada Mohamed Abd Elsattar.
هيئة الاعداد
باحث / غادة محمد عبد الستار السيد
مشرف / محمد كمال عبد السلام عوف
مناقش / محمود صبري سيف
مناقش / تامر محمد سعودى أحمد
الموضوع
Studies on statistics.
تاريخ النشر
2015.
عدد الصفحات
97 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الرياضيات
تاريخ الإجازة
1/8/2015
مكان الإجازة
جامعة الفيوم - كلية العلوم - قسم الرياضيات
الفهرس
Only 14 pages are availabe for public view

from 16

from 16

Abstract

The purpose of this thesis is to de…ne and study properties for certain classes of univalent
and p􀀀valent functions de…ned in the open unit disc U = fz 2 C : jzj < 1g; where C is the
complex plane. These classes are de…ned by using some linear operators, integral operators,
Hadamard product (or convolution) and higher order derivative .
Let A denote the class of all functions of the form
f(z) = z +
1X
k=2
akzk; (1)
which are analytic in U. Also let S denote the subclass of functions of A which are univalent
in U: Further let T the subclass of S all functions of the form:
f(z) = z 􀀀
1X
k=2
akzk (ak  0) :
For two functions f(z) and g (z) in A given by g(z) = z+
1P
k=2
bkzk; the Hadamard product
(or convolution) (f  g)(z) is de…ned by
(f  g)(z) = z +
1P
k=2
akbkzk = (g  f)(z):
De…nition 1 [70]. A function f(z) 2 S is said to be starlike of order if and only if
Re

zf0(z)
f(z)

> ;
for some (0  < 1) and for all z 2 U: The class of all starlike functions of order is
denoted by S ( ) :
De…nition 2 [70]: A function f(z) belonging to S is said to be convex of order if and
only if
Re

1 +
zf00(z)
f0(z)

> ;
for some (0  < 1) and for all z 2 U: The class of all convex functions of order is
denoted by K ( ) :