Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structural, electronic and magnetic properties of ether carbides
  (Fe3W3C, Fe6W6C, Co3W3C and Co6W6C) from first principles calculations   First-principles FLAPW-GGA calculations have been performed with the purpose
to determine the peculiarities of the structural, electronic, magnetic
properties and stability for a family of related ether carbides M3W3C and M6W6C
(where M= Fe and Co). The geometries of all phases were optimized and their
structural parameters, theoretical density, cohesive and formation energies,
total and partial densities of states, atomic magnetic moments have been
obtained and analyzed in comparison with available theoretical and experimental
data.

22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc