  We show that the triply graded Khovanov-Rozansky homology of knots and links
over a field of positive odd characteristic $p$ descends to an invariant in the
homotopy category finite-dimensional $p$-complexes.
  A $p$-extended differential on the triply graded homology discovered by
Cautis is compatible with the $p$-DG structure. As a consequence we get a
categorification of the Jones polynomial evaluated at an odd prime root of
unity
