Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The unboundedness of Hausdorff operators on Quasi-Banach spaces   In this note, we show that the Hausdorff operator $H_{\Phi}$ is unbounded on
a large family of Quasi-Banach spaces, unless $H_{\Phi}$ is a zero operator.

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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: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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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: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys