In this paper, we discuss some applications of Givental's differential
equations to enumerative problems on rational curves in projective
hypersurfaces. Using this method, we prove some of the conjectures on the
structure constants of quantum cohomology of projective hypersurfaces, proposed
in our previous article. Moreover, we clarify the correspondence between the
virtual structure constants and Givental's differential equations when the
projective hypersurface is Calabi-Yau or general type.Comment: 25 pages, Latex, references added, minor errors are correcte