Automorphisms of Real 4 Dimensional Lie Algebras and the Invariant Characterization of Homogeneous 4-Spaces

Christodoulakis, T.; Papadopoulos, G. O.; Dimakis, A.

Automorphisms of Real 4 Dimensional Lie Algebras and the Invariant Characterization of Homogeneous 4-Spaces

Authors

Christodoulakis, T.

Papadopoulos, G. O.

Dimakis, A.

Description

The automorphisms of all 4-dimensional, real Lie Algebras are presented in a comprehensive way. Their action on the space of $4\times 4$, real, symmetric and positive definite, matrices, defines equivalence classes which are used for the invariant characterization of the 4-dimensional homogeneous spaces which possess an invariant basis.
LaTeX2e, 23 pages, 2 Tables. To appear in Journal of Physics A: Mathematical & General