Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-adjointness via partial Hardy-like inequalities   Distinguished selfadjoint extensions of operators which are not semibounded
can be deduced from the positivity of the Schur Complement (as a quadratic
form). In practical applications this amounts to proving a Hardy-like
inequality. Particular cases are Dirac-Coulomb operators where distinguished
selfadjoint extensions are obtained for the optimal range of coupling
constants.

26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs