Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A remarkably simple theory of 3d massive gravity   We propose and study a new action for three-dimensional massive gravity. This
action takes a very simple form when written in terms of connection and triad
variables, but the connection can also be integrated out to obtain a triad
formulation. The quadratic action for the perturbations around a Minkowski
background reproduces the action of self-dual massive gravity, in agreement
with the expectation that the theory propagates a massive graviton. We confirm
this result at the non-linear level with a Hamiltonian analysis, and show that
this new theory does indeed possess a single massive degree of freedom. The
action depends on four coupling constants, and we identify the various massive
and topological (or massless) limits in the space of parameters. This richness,
along with the simplicity of the action, opens a very interesting new window
onto massive gravity.

17
The categories of this paper are: q-fin
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol