Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Evolution of Unpolarized Singlet Structure Functions at Small x   A systematic study is performed of the impact of the various resummed
small-$x$ contributions to the anomalous dimensions and coefficient functions
on the evolution of unpolarized structure functions in deep-inelastic
scattering. The proton structure functions $F_2^p$ and $F_L^p$ as well as the
photon structure function $F_2^{\gamma}$ are considered together with the
corresponding parton densities. The general analytic solution of the evolution
equations in Mellin-$N$ space is derived, and different approximate solutions
are compared. Potential effects of less singular small-$x$ terms in the
anomalous dimension and coefficient functions are discussed.

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The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
2
The categories of this paper are: math
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The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn