Topological Quantum Field Theory for Calabi-Yau threefolds and G_2 manifolds
arXiv:math/0208124
Abstract
We introduce a homology theory whose Euler characteristics counts ASD bundles over four dimensional co-associative submanifolds in (almost) G_2 manifolds. As a TQFT, in relative situations, we have the Fukaya-Floer category of Lagrangians intersection in the moduli space of special Lagrangian submanifolds in CY threefolds.
arXiv comment14 pages. To appear in Adv. Theor. Math. Phys