The quaternionic/hypercomplex-correspondence
2021
Given a quaternionic manifold $M$ with a certain $\mathrm{U}(1)$-symmetry, we construct a hypercomplex manifold $M'$ of the same dimension. This construction generalizes the quaternionic Kahler/ hyper-Kahler-correspondence. As an example of this construction, we obtain a compact homogeneous hypercomplex manifold which does not admit any hyper-Kahler structure. Therefore our construction is a proper generalization of the quaternionic Kahler/hyper-Kahler-correspondence.
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