Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A pragmatical access to the viscous flow   The paper derives a relation for the viscosity of undercooled liquids on the
basis of the pragmatical model concept of Eshelby relaxations with a finite
lifetime. From accurate shear relaxation data in the literature, one finds that
slightly less than half of the internal stresses relax directly via single
Eshelby relaxations; the larger part dissolves at the terminal lifetime, which
is a combined effect of many Eshelby relaxations.

36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom