Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $N\times N$ Matrix Time--Band Limiting examples   In this paper we examine a number of differential operators and a finite
difference operator with $N\times N$ matrix coefficients. These operators are
each related to matrix-valued orthogonal polynomials and they are explicit
examples that fit into the noncommutative time--band limiting framework.
Previous explicit examples have always been $2\times 2$ matrices. We conclude
by considering an $N\times N$ example which only fits into the framework for
$N=2$.

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The categories of this paper are: alg-geom
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The categories of this paper are: physics
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph