  This paper is on $\Gamma$-convergence for degenerate integral functionals
related to homogenisation problems in the Heisenberg group. Here both the
rescaling and the notion of invariance or periodicity are chosen in a way
motivated by the geometry of the Heisenberg group. Without using special
geometric features, these functionals would be neither coercive nor periodic,
so classic results do not apply. All the results apply to the more general case
of Carnot groups.
