TY - THES T1 - Orbifold Cohomology of ADE-singularities Y1 - 2005 A1 - Fabio Perroni KW - Orbifolds PB - SISSA UR - http://hdl.handle.net/1963/5298 U1 - 5126 U2 - Mathematics U3 - Mathematical Physics U4 - -1 ER -