Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Isometric tuples are hyperreflexive   An $n$-tuple of operators $(V_1,...,V_n)$ acting on a Hilbert space $H$ is
said to be isometric if the row operator $(V_1,...,V_n) : H^n \to H$ is an
isometry. We prove that every isometric $n$-tuple is hyperreflexive, in the
sense of Arveson. For $n = 1$, the hyperreflexivity constant is at most 95. For
$n \geq 2$, the hyperreflexivity constant is at most 6.

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The categories of this paper are: cs
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The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol