Gromov--Witten invariants for mirror orbifolds of simple elliptic   singularities
  We consider a mirror symmetry of simple elliptic singularities. In particular, we construct isomorphisms of Frobenius manifolds among the one from the Gromov--Witten theory of a weighted projective line, the one from the theory of primitive forms for a universal unfolding of a simple elliptic singularity and the one from the invariant theory for an elliptic Weyl group. As a consequence, we give a geometric interpretation of the Fourier coefficients of an eta product considered by K. Saito. 
Ikuo Satake, Atsushi Takahashi
math.AG math-ph math.MP math.SG