Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Petrov type of the BMPV metric   We show that the BMPV metric has Petrov type 22. This means that the BMPV
metric is less algebraically special than the five-dimensional Schwarzschild
metric, which has Petrov type \underline{22}.

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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph
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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: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: cs
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int