Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological surgery in the small and in the large   We directly connect topological changes that can occur in mathematical
three-space via surgery, with black hole formation, the formation of wormholes
and new generalizations of these phenomena. This work widens the bridge between
topology and natural sciences and creates a new platform for exploring
geometrical physics.

27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ