Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the extreme behaviour of $g_1(x,Q^2)$ at $x\to 0$   On the basis of the U-matrix form of s-channel unitarization, we consider
constraints unitarity provides for the spin structure function $g_1(x,Q^2)$ at
$x\to 0$. Corresponding constraint for the spin structure function $h_1(x,
Q^2)$ is given along.

15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci