Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the isoperimetric inequality for the magnetic Robin Laplacian with
  negative boundary parameter   We consider the magnetic Robin Laplacian with a negative boundary parameter.
Among a certain class of domains, we prove that the disk maximizes the ground
state energy under the fixed perimeter constraint provided that the magnetic
field is of moderate strength. This class of domains includes, in particular,
all domains that are contained upon translations in the disk of the same
perimeter and all convex centrally symmetric domains.

13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg