COMPUTING THE COMPLETE MASSLESS SPECTRUM OF A LANDAU-GINZBURG ORBIFOLD

We develop techniques to compute the complete massless spectrum in het erotic string compactification on N = 2 supersymmetric Landau-Ginzburg orbifolds. This includes not just the familiar charged fields, but al so the gauge singlets. The number of gauge singlets can vary in the mo duli space of a given compactification and can differ from what it wou ld be in the large radius limit of the corresponding Calabi-Yau. Compa rison with exactly soluble Gepner models Provides a confirmation of ou r results at Gepner Points. Our methods carry over straightforwardly t o (0, 2) Landau-Ginzburg models.