Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inverse problems in spectral geometry   In this survey we review positive inverse spectral and inverse resonant
results for the following kinds of problems: Laplacians on bounded domains,
Laplace-Beltrami operators on compact manifolds, Schr\"odinger operators,
Laplacians on exterior domains, and Laplacians on manifolds which are
hyperbolic near infinity.

22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ