Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonarithmetic superrigid groups: Counterexamples to Platonov's
  conjecture   Margulis showed that "most" arithmetic groups are superrigid. Platonov
conjectured, conversely, that finitely generated linear groups which are
superrigid must be of "arithmetic type." We construct counterexamples to
Platonov's Conjecture.

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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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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: stat