Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: decryst: an efficient software suite for structure determination from
  powder diffraction   Presented here is decryst, a software suite for structure determination from
powder diffraction, which uses the direct space method, and is able to apply
anti-bump constraints automatically and efficiently during the procedure of
global optimisation using the crystallographic collision detection algorithm in
arXiv:1708.03180. decryst employs incremental computation in its global
optimisation cycles, which results in dramatic performance enhancement; it is
also designed with parallel and distributed computing in mind, allowing for
even better performance by simultaneous use of multiple processors. decryst is
free and open source software, and can be obtained at
https://gitlab.com/CasperVector/decryst/; it strives to be simple yet flexible,
in the hope that the underlying techniques could be adopted in more
crystallographic applications.

15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th