I have heard of models of quantum gravity that preserve Lorentz
symmetry, at least in general, but they do not explain how to get
gravitation, mass, or the elasticity of spacetime, which are the three
fundamental properties of spacetime. Does anybody know a site to which
I could go in order to find out more about symmetry preserving models
of quantum gravity? Don't just throw some sites at me at random.
Actually show me based on the experience you've had with the sites.
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