  A duality theorem for the stable module category of representations of a
finite group scheme is proved. One of its consequences is an analogue of Serre
duality, and the existence of Auslander-Reiten triangles for the
$\mathfrak{p}$-local and $\mathfrak{p}$-torsion subcategories of the stable
category, for each homogeneous prime ideal $\mathfrak{p}$ in the cohomology
ring of the group scheme.
