Bulletin of the Brazilian Mathematical Society, cilt.39, sa.1, ss.123-135, 2008 (SCI-Expanded)
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. © 2008 Springer-Verlag Berlin Heidelberg.