Object of investigation are almost hypercomplex manifolds with Hermitian-Norden metrics of the lowest dimension. The considered manifolds are constructed on 4-dimensional Lie groups. It is established a relation between the classes of a classification of 4-dimensional indecomposable real Lie algebras and the classification of the manifolds under study. The basic geometrical characteristics of the constructed manifolds are studied in the frame of the mentioned classification of the Lie algebras.
Classification of Pseudo-Riemannian submersions with totally geodesic fibres from pseudo-hyperbolic spaces
Classification of four-dimensional Lie algebras admitting a para-hypercomplex structure
Classification of solvable 3-dimensional Lie triple systems
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