TitoloA note on Codazzi tensors
Autore/iCatino, G.; Mantegazza, C.; Mazzieri, L.
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AbstractWe 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 eigenvalues. For such manifolds, we prove a structure theorem, without adding extra hypotheses and then we conclude with some application of this theory to the classification of three-dimensional gradient Ricci solitons.