Curvature, Ricci, Einstein and Weyl tensors of Defrise universe with a positive cosmological constant

In this paper, Defrise Universe with positive cosmological constant is studied. Tensors of curvature, as well as Ricci, Einstein and Weyl tensors are calculated. Matrices of covariant and contravariant energy-momentum tensors, and Petrov type are found for the Universe.

УДК 513.813:512.972, 513.814, 530.12

Keywords: Lie algebra, Defrise Universe, Lie group, left-invariant Lorenz metric, Weyl tensor, curvature tensor, Ricci tensor, Einstein tensor, energy-momentum tensor, Petrov types