Subclass of analytic functions associated with Poisson distribution series

In this paper, we find the necessary and sufficient conditions, inclusion relations for Poisson distribution series K ( m , z ) = z + ∑ n = 2 ∞ m n - 1 ( n - 1 ) ! e - m z n belonging to a subclass TS ( λ , α , β ) of analytic functions with negative coefficients. Further, we consider the integral operator G ( m , z ) = ∫ 0 z F ( m , t ) t d t belonging to the above class.