Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hilbert basis of the Lipman semigroup   In this work, we give a new method to compute the Hilbert basis of the
semigroup of certain positive divisors supported on the exceptional divisor of
a normal surface singularity. Our approach is purely combinatorial which
permits to avoid the long calculation of the invariants of the ring as it is
presented in the work of Altinok and Tosun.

17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ