Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Integral and Series Representations of the Dirac Delta Function   Mathematical justifications are given for several integral and series
representations of the Dirac delta function which appear in the physics
literature. These include integrals of products of Airy functions, and of
Coulomb wave functions; they also include series of products of Laguerre
polynomials and of spherical harmonics. The methods used are essentially based
on the asymptotic behavior of these special functions.

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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin