Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simulating DNLS models   We present different techniques to numerically solve the equations of motion
for the widely studied Discrete Nonlinear Schroedinger equation (DNLS). Being a
Hamiltonian system, the DNLS requires symplectic routines for an efficient
numerical treatment. Here, we introduce different such schemes in detail and
compare their performance and accuracy by extensive numerical simulations.

29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg