Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gradient estimates for oblique derivative problems via the maximum
  principle   We prove gradient estimates for solutions of the oblique derivative problem
for a large class of elliptic and parabolic quasilinear PDEs. In particular, we
expand on previous work of the author using a maximum principle argument. In
addition, we prove estimates for the parabolic problem of evolution via mean
curvature with nonzero Neumann data, which seem to be new.

33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat