On Friday, February 22, 2019 at 8:13:21 PM UTC-7, Brent wrote: > > > > On 2/22/2019 6:04 PM, agrays...@gmail.com <javascript:> wrote: > > > > On Friday, February 22, 2019 at 4:55:41 PM UTC-7, Brent wrote: >> >> >> >> On 2/22/2019 2:40 PM, agrays...@gmail.com wrote: >> >> Gravitons, as quanta of the metric field, are already relativistic >>> particles and covariant. >>> >> >> *I thought it's the equations of motion for the particular force, not the >> mediating particles, that must be covariant. On a related topic for this >> thread, where does GR depart from Mach's principle? That is, what did >> Einstein implicitly (or explicitly) deny about Mach's principle? TIA, AG * >> >> >> Einstein thought he would develop a theory that satisfied Mach's >> principle, but as it turned out GR doesn't. For example the metric of >> spacetime is a dynamic field and transmit momentum and energy, as shown by >> LIGO. Mach's idea of spacetime as purely a relation between material >> events couldn't do that. >> >> Brent >> > > *Were you inferring covariance simply because the mediating particle for > gravity, the graviton, travels at the SoL? * > > > GR is a covariant theory. So it's quanta, gravitons, are covariant. >
*I could be mistaken, but I see gravitons as being part of a distinct theory of gravity, which might give the same results as GR. In GR, the paths are determined by geometry in the absence of forces, not by mediating particles. AG * > > *I thought it's the equations of motion for the particular force, not the > mediating particles, that must be covariant. Do we have equations of > motions for strong and weak forces, which are covariant? AG* > > > Forces are mediated by exchange of bosons. Those bosons appear in the > Standard Model Lagrangian, from which equations of motion can be derived. > > > https://en.wikipedia.org/wiki/Mathematical_formulation_of_the_Standard_Model > > 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 everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
