Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Einstein-Hilbert action with cosmological term from Chern-Simons gravity   We propose a modification to the Lie algebra $S$-expansion method. The
modification is carried out by imposing a condition on the $S$-expansion
procedure, when the semigroup is given by a cyclic group of even order. The
$S$-expanded algebras are called $S_{H}$-expanded algebras where $S=Z_{2n}$.
The invariant tensors for $S_{H}$-expanded algebras are calculated and the dual
formulation of $S_{H}$-expansion procedure is proposed. We consider the
$S_{H}$-expansion of the five-dimensional $AdS$ algebra and its corresponding
invariants tensors are found. Then a Chern-Simons Lagrangian invariant under
the five-dimensional $AdS$ algebra $S_{H}$-expanded is constructed and its
relationship to the general relativity is studied.

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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
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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: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: hep-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th