Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Remarks on l-conformal extension of the Newton-Hooke algebra   The l-conformal extension of the Newton-Hooke algebra proposed in [J. Math.
Phys. 38 (1997) 3810] is formulated in the basis in which the flat space limit
is unambiguous. Admissible central charges are specified. The
infinite-dimensional Virasoro-Kac-Moody type extension is given.

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The categories of this paper are: cs
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-ex
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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: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas