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PDF Availablehttps://doi.org/10.31926/but.mif.2021.1.63.1.13
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Cite Publication Date: Oct 7, 2021 |
We consider the four-dimensional Damek-Ricci spaces, equipped with theleft-invariant Lorentzian metric. We obtain a full classification of Killing andaffine vector fields as well as Ricci, curvature and matter collineations. Inparticular, we prove the non-existence of proper (that is non Killing) affinevector field
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