Invariance of Gromov--Witten theory under a simple flop
  We show that the generating functions of Gromov--Witten invariants with ancestors are invariant under a simple flop, for all genera, after an analytic continuation in the extended K\"ahler moduli space. This is a sequel to [LLW]. 
Y. Iwao, Y.-P. Lee, H.-W. Lin, C.-L. Wang