Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Diffusion in stellar interiors: critical tests of three numerical
  methods   We describe and discuss the properties of three numerical methods for solving
the diffusion equation for the transport of the chemical species and of the
angular momentum in stellar interiors. We study through numerical experiments
both their accuracy and their ability to provide physical solutions. On the
basis of new tests and analyses applied to the stellar astrophysical context,
we show that the most robust method to follow the secular evolution is the
implicit finite differences method. The importance of correctly estimating the
diffusion coefficient between mesh points is emphasized and a procedure for
estimating the average diffusion coefficient between a convective and a
radiative zone is described.

3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg