On Sunday, September 29, 2024 at 12:29:34 PM UTC-6 John Clark wrote:
On Sun, Sep 29, 2024 at 2:07 PM Alan Grayson <agrays...@gmail.com> wrote: * >> Galilean relativity is a very good approximation of reality as long as the speeds don't become too high, and it would also be completely invariant under coordinate transformation IF Galileo's assumptions were correct; namely that there is no speed limit in the universe, and velocities always combine linearly even if they're going close to the speed of light, and simultaneity is an objective fact because time is the same for all observers. To put it another way, invariant Galilean transformations are mathematically consistent BUT experiment shows they are NOT physically consistent because Galileo's physical assumptions were NOT correct. It is necessary that a physical theory be mathematically consistent but it is not sufficient.* *> Something's still awry. You agree that tensor equations are invariant under coordinate transformations, and that the Galilean transformation is a coordinate transformation, so that should be enough for ME to be invariant under the GT. Yet you assert it isn't.* *All Galilean tensor equations are 100% mathematically consistent, but physically they are not even approximately correct unless the speeds are very low, and if you're talking about Maxwell's Equations the speeds are very high. You can have Galilean transformations that are mathematically invariant with any change of coordinates, but they are not physically consistent with experimental results because they contain assumptions which turned out not to be physically true. * *Sorry, but this doesn't work for me. The physical deficiencies of the Galilean transformation should not have any effect of the non-invariance of ME when it is applied. So the solution must relate to some error in my concept of the invariance of tensors under coordinate transformations. AG* John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis> npy -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/49f3f8b0-2f78-4544-90b6-4654e6075ceen%40googlegroups.com.
