Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Variants of an explicit kernel-split panel-based Nystr\"om
  discretization scheme for Helmholtz boundary value problems   The incorporation of analytical kernel information is exploited in the
construction of Nystr\"om discretization schemes for integral equations
modeling planar Helmholtz boundary value problems. Splittings of kernels and
matrices, coarse and fine grids, high-order polynomial interpolation, product
integration performed on the fly, and iterative solution are some of the
numerical techniques used to seek rapid and stable convergence of computed
fields in the entire computational domain.

17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int