For example, dynamical boosts do not change the relativistic kinematics
(the relationships between momenta, velocities, and energies of free particles) in collisions, reactions, and decays.
In his classic 1949 study of the empirical foundations of the Minkowski space-time metric, i.e., relativistic kinematics, H.
The question arises whether reciprocity is strictly necessary in the derivation of relativistic kinematics based on PULC.
But it is not, of course, tantamount to obtaining relativistic kinematics, suggestive though the above transformations are.
(d) There is a difference between our PULC-based derivation of relativistic kinematics and that based on light-speed invariance that is worthy of mention.