https://doi.org/10.1140/epjc/s10052-020-08590-8
Regular Article – Theoretical Physics
A new symmetry of the spatially flat Einstein–Friedmann equations
Department of Physics and Astronomy, Bishop’s University, 2600 College Street, J1M 1Z7, Sherbrooke, Québec, Canada
Received:
22
September
2020
Accepted:
20
October
2020
Published online:
30
October
2020
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.
© The Author(s) 2020
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