Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A regularization-free approach to the Cahn-Hilliard equation with
  logarithmic potentials   We introduce a regularization-free approach for the wellposedness of the
classic Cahn-Hilliard equation with logarithmic potentials.

15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph