We consider the space of rapidly decreasing sequences s and the derivative operator D defined on it.The object of this article is to study the equivalence of a
In this article, first, we establish the Fekete and Szeg inequality for an interesting subclass of biholomorphic functions in the open unit disk U. Second, we
We study potential operators and,more generally,Laplace-Stieltjes and Laplace type multipliers associated with the twisted Laplacian.We characterize those 1 ≤