Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Location and Weyl formula for the eigenvalues of some non self-adjoint
  operators   We present a survey of some recent results concerning the location and the
Weyl formula for the complex eigenvalues of two non self-adjoint operators. We
study the eigenvalues of the generator $G$ of the contraction semigroup
$e^{tG}, \: t \geq 0,$ related to the wave equation in an unbounded domain
$\Omega$ with dissipative boundary conditions on $\partial \Omega$. Also one
examines the interior transmission eigenvalues (ITE) in a bounded domain $K$
obtaining a Weyl formula with remainder for the counting function $N(r)$ of
complex (ITE). The analysis is based on a semi-classical approach.

37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th