Almost hypercomplex pseudo-Hermitian manifolds and a 4-dimensional Lie group with such structure

Abstract

Almost hypercomplex pseudo-Hermitian manifolds are considered. Isotropic hyper-Kähler manifolds are introduced. A 4-parametric family of 4-dimensional manifolds of this type is constructed on a Lie group. This family is characterized geometrically. The condition a 4-manifold to be isotropic hyper-Kähler is given.

13 pages, 1 example

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