Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Crystallographic Refinement using Non-Spherical Form Factors in
  olex2.refine   We have implemented a procedure that allows the use of non-spherical atomic
form factors in a standard crystallographic X-Ray refinement. We outline the
procedure for their use, alongside a mathematical justification of their
viability.

2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat