Dear Gyula,
What concerns me now is not that the charges,
masses, and fields are conserved, but that the
Lorentz invariant expression itself, may only
be an approximation. And I am still under the
(stupid maybe) impression that a Lorentz
invariant derivation of motion is identical to
using the Lorentz factor to correct the Lorentz
transformation matrix. That is, that the Lorentz
factor and the Lorentz invariant are the same
thing. Are you able to address these concerns I
have?
Sincerely,
Bill Eshleman