most citedDisconnecting the moduli space of G_2-metrics via U(4)-coboundary defects

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math.GT2018★ 2 cited

Disconnecting the moduli space of G_2-metrics via U(4)-coboundary defects

Dominic Wallis

We exhibit examples of closed Riemannian 7-manifolds with holonomy G_2 such that the underlying manifolds are diffeomorphic but whose associated G_2-structures are not homotopic. T…