Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extremal Eigenvalues of the Laplacian on Euclidean domains and closed
  surfaces   We investigate properties of the sequences of extremal values that could be
achieved by the eigenvalues of the Laplacian on Euclidean domains of unit
volume, under Dirichlet and Neumann boundary conditions, respectively. In a
second part, we study sequences of extremal eigenvalues of the Laplace-Beltrami
operator on closed surfaces of unit area.

26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga