  The three-dimensional non-relativistic isometry algebras, namely Galilei and
Newton-Hooke algebras, are known to admit double central extensions, which
allows for non-degenerate bilinear forms hence for action principles through
Chern-Simons formulation. In three-dimensional colored gravity, the same
central extension helps the theory evade the multi-graviton no-go theorems by
enlarging the color-decorated isometry algebra. We investigate the
non-relativistic limits of three-dimensional colored gravity in terms of
generalized \.In\"on\"u-Wigner contractions.

High Energy Physics - Theory