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2 votes

What is the gravitational field of a hole in an infinite perfect crystal?

The equations that govern gravitational fields and matter simply don't make sense when you apply them to an "infinite" volume of matter. Mathematically, we have $\nabla^2 \phi = 4 \pi G \...
Michael Seifert's user avatar
2 votes

What is the gravitational field of a hole in an infinite perfect crystal?

If you put overdensity next to underdensity, overdensity attracts underdensity and underdensity repels overdensity. They chase each other forever with runaway acceleration. Not true. A volume with ...
gandalf61's user avatar
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1 vote
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Cause of Coordinate Acceleration in Free Fall

The acceleration on a particle following a geodesic is defined by the Christoffel symbols which are in turn defined in terms of the metric. More properly, all inertially-moving objects not affected by ...
controlgroup's user avatar
1 vote

What is the gravitational field of a hole in an infinite perfect crystal?

... overdensity attracts underdensity and underdensity repels overdensity ... Yes, in an empty universe a pair of matched positive and negative masses initially at rest would be self-accelerating ...
A.V.S.'s user avatar
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