Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Linear harmonic oscillator in spaces with degenerate metrics   With the help of contraction method we study the harmonic oscillator in
spaces with degenerate metrics, namely, on Galilei plane and in the flat 3D
Cayley-Klein spaces $R_3(j_2,j_3).$ It is shown that the inner degrees of
freedom are appeared which physical dimensions are different from the dimension
of the space.

13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an