Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A small, infinitely-ended 2-knot group   We show that a 2-knot group discovered in the course of a census of
4-manifolds with small triangulations is an HNN extension with finite base and
proper associated subgroups, and has the smallest base among such knot groups.

0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
19
The categories of this paper are: eess