Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fundamental groups for torus link complements   For an arbitrary positive integer $n$ and a pair $(p, q)$ of coprime
integers, consider $n$ copies of a torus $(p,q)$ knot placed parallel to each
other on the surface of the corresponding auxiliary torus: we call this
assembly a torus $n$-link. We compute economical presentations of knot groups
for torus links using the groupoid version of the Seifert--van Kampen theorem.
Moreover, the result for an individual torus $n$-link is generalized to the
case of multiple "nested" torus links, where we inductively include a torus
link in the interior (or the exterior) of the auxiliary torus corresponding to
the previous link. The results presented here have been useful in the physics
context of classifying moduli space geometries of four-dimensional ${\mathcal
N}=2$ superconformal field theories.

6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess