Semiholonomic verma modules

Verma modules arise geometrically through the jets of homogeneous vector bundles. We consider in this article the modules that arise from the semiholonomic jets of a homogeneous vector bundle. We are particularly concerned with the case of a sphere under Mobius transformations. In this case there are immediate applications in the theory of conformally invariant differential operators. (C) 1997 Academic Press.