PX156 - I2 - continuous symmetries

translation in space: $\overrightarrow{x}\to \overrightarrow{x}+\overrightarrow{a}$, where, $\overrightarrow{a}=$ constant

translation in angle: $\theta \to \theta +{\theta }_0$, where, ${\theta }_0=$ constant

translation in time: $t\to t+t_0$, where, $t_0=$ constant

rely on space-time symmetries for science