Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Divisorial contractions to some Gorenstein singularities   Divisorial contractions to singularities, defined by equations $xy+z^n+u^n=0$
$n\ge3$ and $xy+z^3+u^4=0$ are classified.

26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th