Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the symmetry structure of the minimal surface equation   An infinite sequence of commuting nonpolynomial contact symmetries of the
two-dimensional minimal surface equation is constructed. Local and nonlocal
conservation laws for $n$-dimensional minimal area surface equation are
obtained by using the Noether identity.

32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg