Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Virtual Compton scattering in the generalized Bjorken region and
  positivity bounds on generalized parton distributions   The positivity bounds on generalized parton distributions are derived from
the positivity properties of the absorptive part of the amplitude of the
virtual Compton scattering in the generalized Bjorken region.

4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph