Abstract (EN):
Given D a commutative Noetherian domain and G a finite group acting faithfully on D as automorphisms of D, we describe the Azumaya locus of the crossed product D * G and relate it with the singular locus of D-G. To achieve this we will impose some basic homological conditions on D and on D * G. Also we discuss necessary and sufficient conditions for a crossed product R * G, for some ring R, to be Azumaya. Concepts as H-separability and Galois extensions are used.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Contacto:
pbcarval@fc.up.pt
Nº de páginas:
22