On semi-rigid domains
星期一, 14 九月, 2015 - 13:30
Résumé :
We investigate filtrations corresponding to degree functions induced by locally nilpotent derivations, and we present a class of invariant sub-algebras induced by means of locally nilpotent derivations. We introduce semi-rigid domains, that is, domains for which every non-zero locally nilpotent derivation gives rise to the same filtration, and we discus the correspondence between finitely generated semi-rigid domains and reduced, irreducible affine varieties that admit a unique special $\mathbb{A}^1$-fibration.
Institution de l'orateur :
Dijon
Thème de recherche :
Algèbre et géométries
Salle :
4