Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the folded normal distribution   The characteristic function of the folded normal distribution and its moment
function are derived. The entropy of the folded normal distribution and the
Kullback--Leibler from the normal and half normal distributions are
approximated using Taylor series. The accuracy of the results are also assessed
using different criteria. The maximum likelihood estimates and confidence
intervals for the parameters are obtained using the asymptotic theory and
bootstrap method. The coverage of the confidence intervals is also examined.

7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph