Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gradient regularity for a singular parabolic equation in non-divergence
  form   In this paper we consider viscosity solutions of a class of non-homogeneous
singular parabolic equations $$\partial_t u-|Du|^\gamma\Delta_p^N u=f,$$ where
$-1<\gamma<0$, $1<p<\infty$, and $f$ is a given bounded function. We establish
interior H\"older regularity of the gradient by studying two alternatives: The
first alternative uses an iteration which is based on an approximation lemma.
In the second alternative we use a small perturbation argument.

25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas