Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inverse Nodal Problems   It is shown that nodal sequences determine the underlying manifold up to
scaling within classes of rectangles with Dirichlet boundary conditions,
separable two dimensional tori, two-dimensional flat Klein bottles and flat
tori in two and three dimensions.

21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol