  Let V be a convex vector bundle over a smooth projective manifold X, and let
Y be the subset of X which is the zero locus of a regular section of V. This
mostly expository paper discusses a conjecture which relates the virtual
fundamental classes of X and Y. Using an argument due to Gathmann, we prove a
special case of the conjecture. The paper concludes with a discussion of how
our conjecture relates to the mirror theorems in the literature.
