Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on an absorption problem for a Brownian particle moving in a
  harmonic potential   An analysis is presented of a Brownian particle moving on the half-line,
subject to a restoring force proportional to its displacement and an absorbing
boundary at the origin. When the initial displacement is large, the central
moments of the time to be absorbed tend to finite constants, as do the position
moments when evaluated at the most probable absorption time. These quantities
are derived explicitly.

17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th