Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Erratum to "Solutions problem 89-2: On the principal value of a
  quadruple integral", SIAM Rev. 32 (1990) 143   W. B. Jordan's conclusion that the quadruple principal value integral in
problem 89-2 vanishes does not hold. The error sneaks in through a contribution
of a subintegral which impedes some sign symmetry with respect to the master
parameter (the Fermi radius) and which was overlooked in the published
solution. In summary, the original problem of solving the quadruple integral
remains unsolved.

15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess