Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bottom of spectra and coverings of orbifolds   We discuss the behaviour of the bottom of the spectrum of scalar
Schr\"odinger operators under Riemannian coverings of orbifolds. We apply our
results to geometrically finite and to conformally compact orbifolds.

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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat