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Time and Fermions:General Covariance vs.Ockham's Razor for Spinors
spinor fermion general covariance geometric object nonlinear group realization conventionality of simultaneity Schwarzschild solution
2016/6/15
It is a commonplace in the foundations of physics, attributed to Kretschmann, that any local physical theory can be represented using arbitrary coordinates, simply by using tensor calculus. On the oth...
General Covariance and Background Independence in Quantum Gravity
general covariance background independence quantum gravity string theory loop quantum gravity spin foam models
2016/5/27
The history of general relativity suggests that in absence of experi-mental data, constructing a theory on philosophical first principles can lead to a very useful theory as well as to ground-breaking...