Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Analytic Boris Pusher for Plasma Simulation   This paper discusses how to improve the Boris pusher used to advance
relativistic charged particles in fixed electromagnetic fields. We first derive
a simpler solution to a flaw previously discovered by others. We then derive a
new analytic Boris pusher that is a minor modification to the original
split-time scheme, except for the calculation of {\gamma}. This analytic pusher
assumes that the change of {\gamma} during a particle advance is small. It is
less accurate than the pusher derived by Fei Li et. al., but is nearly twice as
fast. We will discuss when it is advantageous and when it is not.

20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg