Abstract
The Laplacian flow is a geometric flow introduced by Bryant as a way for finding torsion free \(G_2\)-structures starting from a closed one. If the flow is invariant under a free \(S^1\) action then it descends to a flow of SU(3)-structures on a 6-manifold. In this article we derive expressions for these evolution equations. In our search for examples we discover the first inhomogeneous shrinking solitons, which are also gradient. We also show that any compact non-torsion free soliton admits no infinitesimal symmetry.
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