Poincar?-Lorentz vs. Einstein-Minkowski re Time
Janusz Dyonizy Laski
The Poincar?-Lorentz approach to relativity differs from the Einstein-Minkowski approach because it includes an aether, and so admits an observer velocity relative to that aether. With that additional parameter, Poincar?-Lorentz theory can produce both time dilation and time contraction.
