a Dipartimento di Matematica “U. Dini”, Università di Firenze, Viale Morgagni, 67 A, Firenze, Italy b Department of Mathematics and Computer Science, Chapman University, Orange, CA 92866, USA
Abstract:
In this paper we develop the fundamental elements and results of a new theory of regular functions of one quaternionic variable. The theory we describe follows a classical idea of Cullen, but we use a more geometric formulation to show that it is possible to build a rather complete theory. Our theory allows us to extend some important results for polynomials in the quaternionic variable to the case of power series.