Nonlinear realization of extended superconformal symmetry

The Cartan forms, infinitesimal and finite transformations of the Goldstone and matter superfields, the generators, torsion, and curvature are calculated for the nonlinear realization of extended superconformal symmetry. A covariant condition that eliminates goldstonions of the special superconformal transformations is discussed, together with a chiral realization. A “minimal” effective action for the Goldstone fields parametrized by ordinary space-time coordinates is constructed.