On Tuesday, March 26, 2019 at 7:58:11 PM UTC-6, Brent wrote: > > > > On 3/26/2019 12:29 PM, [email protected] <javascript:> wrote: > > > > On Tuesday, March 26, 2019 at 11:29:08 AM UTC-6, John Clark wrote: >> >> On Tue, Mar 26, 2019 at 1:14 PM <[email protected]> wrote: >> >> *> How do the mathematicians prove it?* >> >> >> Mathematicians can't prove that a physical theory is correct, all they >> can do is show that changing the coordinate system (for example by rotating >> the X and Y axis) does not result in different physical predictions. Only >> exparament can tell you if the predictions is right, or at least mostly >> right. >> >> John K Clark >> > > I'm not asking if GR is correct; rather, whether it is covariant. > Moreover, for SR we can prove covariance, since under the LT, the law of > physics don't change and the SoL is c in any inertial frame. ME are also > invariant under the LT. AG > > > Look at the paper by Gupta and Padmanabhan that I linked to. >
*I looked through your posts here and do not find these papers. Please post the links. I want to spend more time reading relevant articles, than asking questions. AG* > The equations are written a manifestly covariant form, so no "proof" is > relevant. > *That's what I need to grasp; what is a covariant form and why it's sufficient to establish covariance, or frame independence of the laws of physics. AG * But the equations are local, partial differential equations. So when you > want to calculate something that involves radiation (and accelerating a > mass produced gravitational radiation), even though the local equations are > covariant the solution depends on an integral equation over the past motion > of the body. Since that motion can be, ex hypothesi, arbitrary, there's no > general transformation between two reference systems that have gone through > arbitrary motions in the past. > > Brent > -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
