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math.DG2024
Submersion constructions for geometries with parallel skew torsion
Andrei Moroianu, Paul Schwahn
In the absence of a de Rham decomposition theorem for geometries with torsion, we develop and unify ways to view a geometry with parallel skew torsion as the total space of a local…
math.DG2024
On the rigidity of the complex Grassmannians
Paul Schwahn, Uwe Semmelmann
We study the integrability to second order of the infinitesimal Einstein deformations of the symmetric metric on the complex Grassmannian of -planes inside . B…