Key points are not available for this paper at this time.
These notes are devoted to explaining aspects of the mirror manifold problem that can be naturally understood from the point of view of topological field theory. Basically this involves studying the topological field theories made by twisting N=2 sigma models. This is mainly a review of old results, except for the discussion in 7 of certain facts that may be relevant to constructing the ``mirror map'' between mirror moduli spaces.
Edward Witten (1991) studied this question.