Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Path Integral Treatment of Singular Problems and Bound States: Quantum
  Mechanics   A path-integral approach for the computation of quantum-mechanical
propagators and energy Green's functions is presented. Its effectiveness is
demonstrated through its application to singular interactions, with particular
emphasis on the inverse square potential--possibly combined with a
delta-function interaction. The emergence of these singular potentials as
low-energy nonrelativistic limits of quantum field theory is highlighted. Not
surprisingly, the analogue of ultraviolet regularization is required for the
interpretation of these singular problems.

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The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
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The categories of this paper are: eess
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph