Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Riesz sequences and generalized arithmetic progressions   The purpose of this note is to verify that the results attained in [6] admit
an extension to the multidimensional setting. Namely, for subsets of the two
dimensional torus we find the sharp growth rate of the step(s) of a generalized
arithmetic progression in terms of its size which may be found in an
exponential systems satisfying the Riesz sequence property.

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The categories of this paper are: econ
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The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: atom-ph
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The categories of this paper are: eess
3
The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: q-fin
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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: q-bio
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The categories of this paper are: acc-phys