Chern-Simons forms of pseudo-Riemannian homogeneity on the oscillator group.
Un ejemplo de elemento del anillo RU().
Exotic characteristic classes and subfoliations
A topological obstruction for a foliation be a sub-foliation of another is given by comparing the images of the associated characteristic homomorphisms (in the sense of Lehmann).
Errata : Exotic characteristic classes and subfoliations
Totally umbilical pseudo-Riemannian submanifolds of the paracomplex projective space
Connections partially adapted to a metric -structure
Projective torsion and curvature, axiom of planes and free mobility for almost-product manifolds
Homogeneous quaternionic Kähler structures on Alekseevskian 𝒲-spaces
The homogeneous quaternionic Kähler structures on the Alekseevskian 𝒲-spaces with their natural quaternionic structures, each of these spaces described as a solvable Lie group, and the type of such structures in Fino's classification, are found.
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