The trace of a module $M$ is the sum of the images of all $R$-module homomorphisms from $R$ into $M$.…
Categoria evento: Algebra Seminar
Multiplicity sequence and integral dependence – Ngo Viet Trung (Institute of Mathematics, Vietnam Academy of Science and Technology)
In 1961 Rees proved a criterion for integral dependence between two ideals of finite colengths by the equality of their…
Ulrich elements in normal affine semigroup rings – Dumitru Stamate (University of Bucharest)
We study the almost Gorenstein property in the sense of Goto et al for the class of normal semigroup rings. The graded version is related to the existence of what we call Ulrich elements for the semigroup. …