Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A high order positivity preserving DG method for
  coagulation-fragmentation equations   We design, analyze and numerically validate a novel discontinuous Galerkin
method for solving the coagulation-fragmentation equations. The DG
discretization is applied to the conservative form of the model, with flux
terms evaluated by Gaussian quadrature with $Q=k+1$ quadrature points for
polynomials of degree $k$. The positivity of the numerical solution is enforced
through a simple scaling limiter based on positive cell averages. The
positivity of cell averages is propagated by the time discretization provided a
proper time step restriction is imposed.

22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph