Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Smooth structures on Morse trajectory spaces, featuring finite ends and
  associative gluing   We give elementary constructions of manifold with corner structures and
associative gluing maps on compactifications of spaces of infinite, half
infinite, and finite Morse flow lines.

28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex