Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-local diffusion equations with L\'evy-type operators and divergence
  free drift   We are interested in some properties related to the solutions of non-local
diffusion equations with divergence free drift. Existence, maximum principle
and a positivity principle are proved. In order to study Holder regularity, we
apply a method that relies in the Holder-Hardy spaces duality and in the
molecular characterisation of local Hardy spaces. In these equations, the
diffusion is given by L\'evy-type operators with an associated L\'evy measure
satisfying some upper and lower bounds.

11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph