Axil wrote Domino Valdano, PhD Theoretical PhysicsIn Einstein's theory of special relativity, the relationship between the energy, momentum, and mass of a particle is E2=(pc)^2+(mc2)^2
It was realized early on that if you plug in a negative value for m2 into this equation, you get a combination of momentum and energy that implies the particle must always travel faster than light. That is, v=pc2/E>c The magnetic forces are not conserved (electromagnetic, gravitomagnetic, and nuclear spin orbit) Magnetic inductance is not conserved. By analogy inertial mass is not conserved. Special Relativity shows that inertial mass can be modified with introduction of velocity. It may also be modified under other condtions. This is known but often overlooked. It is, however, central to my writings. Frank Znidarsic
