Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generation of a dipole moment by external field in Born-Infeld
  non-linear electrodynamics   The mechanism for the generation of a dipole moment due to an external field
is presented for the Born-Infeld charged particle. The 'polarizability
coefficient' is calculated: it is proportional to the third power of the
characteristic length in the Born-Infeld theory. Some physical implications are
briefly discussed.

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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
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The categories of this paper are: q-alg
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The categories of this paper are: stat
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
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The categories of this paper are: physics