Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Propagation of the main signal in a dispersive Lorentz medium   Evolution of the main signal in a Lorentz dispersive medium is considered.
The signal propagating in the medium is excited by a sine-modulated pulse
signal, with its envelope described by a hyperbolic tangent function. Both
uniform and non-uniform asymptotic representations for the signal are found. It
is shown when the uniform representation can be reduced to the non-uniform one.
The results obtained are illustrated with a numerical example.

22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
19
The categories of this paper are: eess