Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Truncated Moments of Nonsinglet Parton Distributions in the double
  logarithmic $ln^2x$ approximation   The method of truncated Mellin moments in a solving QCD evolution equations
of the nonsinglet structure functions $F_2^{NS}(x,Q^2)$ and $g_1^{NS}(x,Q^2)$
is presented. All calculations are performed within double logarithmic $ln^2x$
approximation. An equation for truncated moments which incorporates $ln^2x$
effects is formulated and solved for the unintegrated structure function
$f^{NS}(x,Q^2)$. The contribution to the Bjorken sum rule coming from the
region of very small $x$ is quantified. Further possible improvement of this
approach is also discussed.

28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas