Invariants of hypergeometric groups for Calabi–Yau complete intersections in weighted projective spaces

摘要

Let Y be a Calabi–Yau complete intersection in a weighted projective space. We show that the space of quadratic invariants of the hypergeometric group associated with the twisted I-function is onedimensional, and spanned by the Gram matrix of a split-generator of the derived category of coherent sheaves on Y with respect to the Euler form.