Inclusion and Subordination Properties for Classes of Multivalent Functions Involving Differ-Integral Operator

: In this paper, using the linear operator d λ,l p,m(a, c,µ) defined by a convolution product [2] we introduced and studied a general class of multivalent functions in the open unit disc introduced by using the concept of the subordination. The main results we obtained deals with inclusion properties between these classes, and with some general subordination properties connected with the mentioned operator. All the results are sharp, the best possible, and are followed by special cases connected with the new defined classes, and other applications in the theory of multivalent and univalent functions.