Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Be careful with the Exp-function method   An application of the Exp-function method to search for exact solutions of
nonlinear differential equations is analyzed. Typical mistakes of application
of the Exp-function method are demonstrated. We show it is often required to
simplify the exact solutions obtained. Possibilities of the Exp-function method
and other approaches in mathematical physics are discussed. The application of
the singular manifold method for finding exact solutions of the Fitzhugh -
Nagumo equation is illustrated. The modified simple equation method is
introduced. This approach is used to look for exact solutions of the
generalized Korteweg - de Vries equation.

11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas