Involutions on classical crossed products over global fields
Fecha
2002Resumen
If L/K is a finite Galois extension of the global field K with Galois group G, we denote by A = (L/K, alpha) the crossed product algebra of G over L, where alpha is the factor set of G. We give a criterion when A admits an involution of the first kind by which a characterization of the factor set is given.