Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Computational Aspects of Characteristic Mode Decomposition -- An
  Overview   Nearly all practical applications of the theory of characteristic modes (CMs)
involve the use of computational tools. Here in Paper 2 of this Series on CMs,
we review the general transformations that move CMs from a continuous
theoretical framework to a discrete representation compatible with numerical
methods. We also review several key topics related to computational CMs,
including modal tracking, dynamic range, code validation, electrically large
problems, and non-PEC techniques.

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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex
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The categories of this paper are: econ
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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
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The categories of this paper are: cond-mat
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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
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The categories of this paper are: stat
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The categories of this paper are: physics
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The categories of this paper are: hep-ex