ELLIPTIC GENERA AND THE LANDAU-GINZBURG APPROACH TO N=2 ORBIFOLDS

We compute the elliptic genera of orbifolds associated with N = 2 supe rconformal theories which admit a Landau-Ginzburg description. The ide ntification of the elliptic genera of the macroscopic Landau-Ginzburg orbifolds with those of the corresponding microscopic N = 2 orbifolds further supports the conjectured identification of these theories. For SU(N) Kazama-Suzuki models the orbifolds are associated with certain Z(p) subgroups of the various coset factors. Based on our approach we also conjecture the existence of ''E-type'' variants of these theories , their elliptic genera and the corresponding Landau-Ginzburg potentia ls.