Moment angle complexes and duality for tight manifolds

Abstract

For a field $\mathbb{F}$ and a triangulated compact $\mathbb{F}$-orientable manifold, consider the homology of the associated Moment-Angle ccomplex $H_{\ast }({\mathcal{Z}}_{\mathcal{K}})$. We show the total homology rank ${\hat{I}}^2({\mathcal{Z}}_{\mathcal{K}})$ satisfies the inequality ${\hat{I}}^2({\mathcal{Z}}_{\mathcal{K}};\mathbb{F})\ge 2^{m-1}({\hat{I}}^2(\mathcal{K};\mathbb{F})-2)+2$, with equality occurring exactly when the triangulation is $\mathbb{F}$-tight. Using Lefschetz duality, we introduce a short exact sequence of functors that, in turn, introduces a new duality theorem in Double Homology for tight manifold triangulations.