Poincaré series for filtrations defined by discrete valuations with arbitrary center

Antonio Campillo (1) , Ann Lemahieu (2)

1 AGT-UVA - Departamento de Algebra, Geometria y Topologia
2 UNS - Université Nice Sophia Antipolis (1965 - 2019)

To study singularities on complex varieties we study Poincaré series of filtrations that are defined by discrete valuations on the local ring at the singularity. In all previous papers on this topic one poses restrictions on the centers of these valuations and often one uses several definitions for Poincaré series. In this article we show that these definitions can differ when the centers of the valuations are not zero-dimensional, i.e. do not have the maximal ideal as center. We give a unifying definition for Poincaré series which also allows filtrations defined by valuations that are all nonzero-dimensional. We then show that this definition satisfies a nice relation between Poincaré series for embedded filtrations and Poincaré series for the ambient space and we give some application for singularities which are nondegenerate with respect to their Newton polyhedron.

Domaines: Mathématiques [math]

Antonio Campillo, Ann Lemahieu. Poincaré series for filtrations defined by discrete valuations with arbitrary center. Journal of Algebra, 2013, 377, pp.66-75. ⟨10.1016/j.jalgebra.2012.11.031⟩. ⟨hal-01280035⟩