Boundary value problems in dimensions seven, four and three related to exceptional holonomy
Donaldson, Simon
Original · EN
In the paper we introduce a boundary value problem for a G₂ structure on a 7-manifold with boundary, with prescribed 3-form on the boundary. We make some general observations about this problem and then study in more detail reductions to 4 and 3 dimensions by imposing symmetry. The 3-dimensional reduction admits a dual variational formulation in terms of solutions of the real Monge-Ampere equation
English translation
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