Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Massive Gravity in Three Dimensions   A particular higher-derivative extension of the Einstein-Hilbert action in
three spacetime dimensions is shown to be equivalent at the linearized level to
the (unitary) Pauli-Fierz action for a massive spin-2 field. A more general
model, which also includes `topologically-massive' gravity as a special case,
propagates the two spin 2 helicity states with different masses. We discuss the
extension to massive ${\cal N}$-extended supergravity, and we present a
`cosmological' extension that admits an anti-de Sitter vacuum.

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The categories of this paper are: astro-ph
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The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: cs
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics