Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The dipole form of the quark part of the BFKL kernel   The dipole form of the ``Abelian'' part of the massless quark contribution to
the BFKL kernel is found in the coordinate representation by direct transfer
from the momentum representation where the contribution was calculated before.
It coincides with the corresponding part of the quark contribution to the
dipole kernel calculated recently by Balitsky and is conformal invariant.

10
The categories of this paper are: q-bio
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The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
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The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg