Generators for semigroup of Lipman

Altmok S., TOSUN M.

BULLETIN OF THE BRAZILIAN MATHEMATICAL SOCIETY, vol.39, no.1, pp.123-135, 2008 (SCI-Expanded) identifier identifier


There is a correspondence between functions in the maximal ideal of the local ring of a rational singularity and certain positive divisors supported on the exceptional fiber of a resolution of the singularity. Here we give an algorithm to obtain a generating set over Z of these divisors.