One of the most common continuous symmetries of a relativistic theory is Lorentz invariance, i.e., the dynamics is the same in any Lorentz frame. The group of Lorentz transformations can be decomposed...One of the most common continuous symmetries of a relativistic theory is Lorentz invariance, i.e., the dynamics is the same in any Lorentz frame. The group of Lorentz transformations can be decomposed into two parts: (1) Boosts, where we go from one Lorentz frame to another, i.e., we change the velocity. and (2) Rotations, where we change the orientation of the coordinate frame.