Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-relativistic $k$-contractions of the Coadjoint Poincar\'e algebra   We study a class of extensions of the k-contracted Poincar\'e algebra under
the hipotesis of generalizing the Bargmann algebra and his central charge. As
we will see this type of contractions will lead in a natural way to consider
the codajoint Poincar\'e algebra and some of their contractions. Among them
there is one such that. considering the quotient of it by a suitable ideal, the
(stringy) p-brane Galilei algebra is recovered.

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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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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: econ
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: math
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph