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math.DG2012
A note on Codazzi tensors
Giovanni Catino, Carlo Mantegazza, Lorenzo Mazzieri
We discuss a gap in Besse's book, recently pointed out by Merton, which concerns the classification of Riemannian manifolds admitting a Codazzi tensors with exactly two distinct ei…
math.DG2012
Gradient Einstein solitons
Giovanni Catino, Lorenzo Mazzieri
In this paper we consider a perturbation of the Ricci solitons equation proposed by J. P. Bourguignon in \cite{jpb1}. We show that these structures are more rigid then standard Ric…