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arxiv: 1808.05585 · v2 · pith:6VVUM4YWnew · submitted 2018-08-16 · 🧮 math.DG · math.AT

Distinguishing G₂-manifolds

classification 🧮 math.DG math.AT
keywords connectedmanifoldsdescribedistinguishinvariantsusedaboveclosed
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In this survey, we describe invariants that can be used to distinguish connected components of the moduli space of holonomy G_2 metrics on a closed 7-manifold, or to distinguish G_2-manifolds that are homeomorphic but not diffeomorphic. We also describe the twisted connected sum and extra-twisted connected sum constructions used to realise G_2-manifolds for which the above invariants differ.

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