Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalizing Hopf's boundary point lemma   We give a Hopf boundary point lemma for weak solutions of linear divergence
form uniformly elliptic equations, with H$\ddot{\text{o}}$lder continuous
top-order coefficients and lower-order coefficients in a Morrey space.

9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs