Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some Constructions of Divisible Designs from Laguerre Geometries   In the nineties, A.G. Spera introduced a construction principle for divisible
designs. Using this method, we get series of divisible designs from finite
Laguerre geometries. We show a close connection between some of these divisible
designs and divisible designs whose construction was based on a conic in a
plane of a 3-dimensional projective space.

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The categories of this paper are: hep-ex
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The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: atom-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: chem-ph