Invariant of the hypergeometric group associated to the quantum   cohomology of the projective space
  We present a simple method to calculate the Stokes matrix for the quantum cohomology of the projective spaces ${CP}^{k-1}$ in terms of certain hypergeometric group. We present also an algebraic variety whose fibre integrals are solutions to the given hypergeometric equation. 
Susumu Tanab\'e