Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Square function estimates for discrete Radon transforms   We show $\ell^p\big(\mathbb Z^d\big)$ boundedness, for $p\in(1, \infty)$, of
discrete singular integrals of Radon type with the aid of appropriate square
function estimates, which can be thought as a discrete counterpart of the
Littlewood--Paley theory. It is a very powerful approach which allows us to
proceed as in the continuous case.

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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: bayes-an
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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: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: cs
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph