| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4606147 | Differential Geometry and its Applications | 2013 | 14 Pages |
Abstract
We describe four-dimensional Lie groups equipped with a left-invariant Lorentzian metric, obtaining a complete classification of the Einstein and Ricci-parallel examples.
Related Topics
Physical Sciences and Engineering
Mathematics
Analysis
Authors
Giovanni Calvaruso, Amirhesam Zaeim,