Differential Sandwich Theorems with Generalised Derivative Operator

Uniformly Geometric Functions Involving Constructed Operators

“…Let us consider the differential operators , and introduced, respectively, in [1,2]. Then, the convoluted operator of both of them is …”

Concave Meromorphic Functions Involving Constructed Operators

“…Let us consider the differential operators R n α,λ and D n λ which introduced respectively in [10] and [4]. Then, the convoluted operator of both of them is…”

Fekete-Szego Theorem for a Class of Functions ¨ Defined by a Derivative Operator

“…• The generalised Ruscheweyh and Sǎlǎgean derivative operator introduced by Darus and Al-shaqsi (see [11]);…”