On Jul 22, 5:57 pm, Michael Gordge <mikegor...@xtra.co.nz> wrote: > On Jul 22, 11:35 pm, bert <herbertglazie...@msn.com> wrote: > > Spaceandtimeare two sides to the same coin. Einstein merged them. > Only because he refused to accept / he rejected the law of identity.
It was not Einstein, but his teacher, Minkowski who "merged them". But even this is wrong. It was Galileo who merged them -- what counts is that the appearance of a mixed space-time symmetry. That's what marries space and time. The marriage was already in place when the extra "space-time" term in the transformation law appeared under Lorentz. This did not effect the marriage, but merely consummated a union that was already in place for around 300 years.
Before Galileo, the symmetries for space (3 degrees of translation symmetry + 3 degrees of rotational symmetry) were separate from the symmetries for time (1 degree of translation symmetry). After Galileo, there were also the 3 extra degrees of symmetry: the boosts (3 degrees of COMBINED space-time symmetry).
Hence, the union. A gunshot wedding that was kept quiet (even after the union was consummated by Minkowski).
It took 300 years for the marriage to be consummated and 400 years for the true age of the union to be recognized.