Albert Picone e Antonio Giorgio Spera

"Automorphisms of Hyperelliptic GAG-codes"

In this talk, we discuss the n-automorphism groups of generalized
algebraic-geometry codes associated with rational, elliptic and
hyperelliptic function fields. Such groups are, up to isomorphism, 
subgroups of the automorphism groups of the underlying function fields. We
also present some examples in which the n-automorphism groups can be 
 determined explicitly.