On Interval Systems [<Emphasis Type="Italic">x</Emphasis>] = [<Emphasis Type="Italic">A</Emphasis>][<Emphasis Type="Italic">x</Emphasis>] + [<Emphasis Type="Italic">b</Emphasis>] and the Powers of Interval Matrices in Complex Interval Arithmetics

For the interval system of equations defined by x] = A]x] + b] we derive necessary and sufficient criteria for the existence of solutions x]. Furthermore we give necessary and sufficient criteria for the convergence of powers of A]. In contrast to former results we treat complex interval arithmetics.