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Edit: this thread was split off from another where it was off topic https://www.physicsforums.com/threa...gful-to-speak-of-the-density-of-space.843442/ . The question in the original thread was if you could express GR in terms of a density of spacetime. I made a mistake in the following response, and Demystifier explains:
The number of degrees of freedom is too small. A density field has one degree of freedom. The metric has 10. You cannot replace something with 10 degrees of freedom by something with 1.
The number of degrees of freedom is too small. A density field has one degree of freedom. The metric has 10. You cannot replace something with 10 degrees of freedom by something with 1.
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