67 citations · 506 across the 65 of their papers we have counts for
69 papers
Conformal Killing -Forms on Compact Symmetric Spaces
Andrei Moroianu, Uwe Semmelmann
We show that a simply connected compact symmetric space of dimension admits a conformal Killing -form which is not Killing if and only if it is homothetic to one of $\m…
The index of cubic focal manifolds
Niklas Rauchenberger, Uwe Semmelmann
We calculate the index and nullity of the three orientable focal manifolds of isoparametric hypersurfaces in spheres with three distinct principal curvatures. It turns out that the…
Eigenvalue value estimates and stability of positive quaternion-Kähler manifolds
Yasushi Homma, Uwe Semmelmann
In this article we study the stability problem for positive quaternion-Kähler manifolds. We give a description of infinitesimal Einstein deformations and destabilising directions i…
The Pestov identity on the frame bundle and associated homogeneous fibrations
Mihajlo Cekić, Thibault Lefeuvre, Andrei Moroianu +1
In this short note, we prove a global Pestov identity on the (orthonormal) frame bundle of a Riemannian manifold and deduce similar identities on associated homogeneous fibrations.…
-structures with parallel skew-symmetric torsion
Andrei Moroianu, Uwe Semmelmann
We classify -dimensional Riemannian manifolds carrying a metric connection with parallel skew-symmetric torsion whose holonomy is contained in , up to naturally re…
Einstein metrics, their moduli spaces and stability
Paul Schwahn, Uwe Semmelmann
This survey deals with two closely connected topics: first, the stability of Einstein metrics under the Einstein-Hilbert functional, and second, their deformation theory and the st…