Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asymptotic theory of relativistic, magnetized jets   The structure of a relativistically hot, strongly magnetized jet is
investigated at large distances from the source. Asymptotic equations are
derived describing collimation and acceleration of the externally confined jet.
Conditions are found for the transformation of the thermal energy into the
fluid kinetic energy or into the Poynting flux. Simple scalings are presented
for the jet collimation angle and Lorentz factors.

28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg