A new symmetry of the spatially flat Einstein-Friedmann equations
arXiv:2009.03235 · doi:10.1140/epjc/s10052-020-08590-8
Abstract
We report a new symmetry of the Einstein-Friedmann equations for spatially flat Friedmann- Lemaître-Robertson-Walker universes. We discuss its application to barotropic perfect fluids and its use as a solution-generating technique for scalar field universes.
7 pages, no figures