Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kinetic equation and magneto-conductance for Weyl metal in the clean
  limit   We discuss the semi-classical kinetic equation in the clean limit, with the
presence of Berry curvatures and magnetic field B, with the aim of applying to
Weyl semi-metals. Special attention is given to the conservation laws for the
collision integrals. It is found that the magneto-resistance second order in B
is in general negative, with or without Weyl points, though in the later case
it is in general much smaller.

14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg