Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasi boundary triples and semibounded self-adjoint extensions   In this note semibounded self-adjoint extensions of symmetric operators are
investigated with the help of the abstract notion of quasi boundary triples and
their Weyl functions. The main purpose is to provide new sufficient conditions
on the parameters in the boundary space to induce self-adjoint realizations,
and to relate the decay of the Weyl function to estimates on the lower bound of
the spectrum. The abstract results are illustrated with uniformly elliptic
second order PDEs on domains with non-compact boundaries.

30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas