%0 Journal Article
%T On the Betti numbers of some semigroup rings
%A Vincenzo Micale
%A Anda Georgiana Olteanu
%J Le Matematiche
%D 2012
%I University of Catania
%X For any numerical semigroup S, there are infinitely many numerical symmetric semigroups T such that S = T/2 (see below for the definition of T/2) is their half. We are studying the Betti numbers of the numerical semigroup ring K[T ] when S is a 3-generated numerical semigroup or telescopic. We also consider 4-generated symmetric semigroups and the so called 4-irreducible numerical semigroups.
%K Numerical semigroups
%K Betti numbers
%K Semigroup rings
%K Simplicial complexes
%U http://www.dmi.unict.it/ojs/index.php/lematematiche/article/view/949