Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: FEAST for differential eigenvalue problems   An operator analogue of the FEAST matrix eigensolver is developed to compute
the discrete part of the spectrum of a differential operator in a region of
interest in the complex plane. Unbounded search regions are handled with a
novel rational filter for the right half-plane. If the differential operator is
normal or self-adjoint, then the operator analogue preserves that structure and
robustly computes eigenvalues to near machine precision accuracy. The algorithm
is particularly adept at computing high-frequency modes of differential
operators that possess self-adjoint structure with respect to weighted Hilbert
spaces.

8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc