- #1

bhobba

Mentor

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## Main Question or Discussion Point

I have been reviewing GR lately because as a mentor I find myself now answering more of those questions. I learnt GR years ago from Wald and other sources, but since then have been exposed to the symmetries of the Standard Model. What struck me during this review is I now have a different perspective. I now suspect like all the other fundamental forces it is a gauge theory. Its gauge being invariance to coordinate transformations. Is this the right way of looking at it or is an I missing something? Exactly what gauge group would it be? Or is this a matter of exactly what one considers a gauge theory? I am not sure it can be formulated as a Yang-Mills theory (if so it would of course it would be one in the ordinary sense) - but came across the following I need to study:

https://cds.cern.ch/record/338848/files/9711054.pdf

Thanks

Bill

https://cds.cern.ch/record/338848/files/9711054.pdf

Thanks

Bill