Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-Peierls vs. Peierls distortions in a family of conjugated Polymers   Distortions in a family of conjugated polymers are studied within two
complementary approaches, i.e. within a many-body Valence Bond (VB) approach
using a transfer matrix technique to treat the Heisenberg model of the systems,
and also in terms of the tight-binding band-theoretic model with interactions
limited to nearest neighbors. The computations indicate that both methods
predict the presence or absence of the same distortions in most of the polymers
studied.

21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
2
The categories of this paper are: math