Using convolution (or Hadamard product), we define the El-Ashwah and Drbuk linear operator, which is a multivalent function in the unit disk U=w:w<1 and w∈₵, and satisfy its specific relationship to derive the subordination, superordination, and sandwich results for this operator by using properties of subordination and superordination concepts.
By applying Ruscheweyh derivative on the class AS H (λ, α, k, γ) of harmonic univalent functions in the unit disk U , we obtain several interesting properties such as sharp coefficient relations, distortion bounds, extreme points, Hadamard product, and other results.
Mathematics Subject Classification: 30C45
In this paper, we obtain known the class
T
U
H
*
(
γ
,
n
,
μ
,
l
,
β
)
by working application of the Catas operator and we provide sufficient and necessary conditions for the functions to be in
T
U
H
*
(
γ
,
n
,
μ
,
l
,
β
)
.
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