| |
| The Lorentz transformation is derived without the postulate of the
universal limiting speed, and the general Edwards transformation
is obtained by using the principle of permutation invariance
(covariance). It is shown that the existences of the one-way
universal limiting speed (in the Lorentz transformation) and the
constancy of the two-way average speed of light (in the Edwards
transformation) are the necessary consequences of the principle of
permutation invariance that is consistent with the postulate of
relativity. The connection between the Edward transformation and
the general coordinate transformation is discussed, and based on
this, we find that the physical meaning of the Edward parameter,
which indicates the anisotropy of the speed of light, is a
gravitomagnetic potential of the spacetime. |
|
| Keywords:Lorentz, Edwards transformations, the principle of permutation invariance |
|
