Propagation of Gevrey singularities for solutions of linear differential operators with constant coefficients

Summary In [4]L. Hörmander has given sufficient conditions for propagation of Csingularities for solutions of linear differential operators P with constant coefficients in terms of limit operators called «localization of P at infinity». In this paper a result (Theorem 1.2) of the same type concerning the propagation of Gevrey singularities is given.