Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comments on some recent papers on the hyperspherical approach in
  few-body systems   Recent papers by Kievsky, Viviani, and Rosati are commented. It is pointed
out that the techniques for treatment few-body reactions and bound states in
the framework of the hyperspherical approach presented in those papers as
original ones were in fact known and have been applied previously.

11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex