  We construct an action of a polynomial ring on the colored sl(2) link
homology of Cooper-Krushkal, over which this homology is finitely generated. We
define a new, related link homology which is finite dimensional, extends to
tangles, and categorifies a scalar-multiple of the sl(2) Reshetikhin-Turaev
invariant. We expect this homology to be functorial under 4-dimensional
cobordisms. The polynomial action is related to a conjecture of
Gorsky-Oblomkov-Rasmussen-Shende on the stable Khovanov homology of torus
knots, and as an application we obtain a weak version of this conjecture. A key
new ingredient is the construction of a bounded chain complex which
categorifies a scalar multiple of the Jones-Wenzl projector, in which the
denominators have been cleared.
