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I Use The General Relativity Definition

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Posted by Richard Ruquist on March 22, 2002 14:43:19 UTC

That theory describes all space as a function of the distribution of mass in the universe. So by thgis definition, the geometry of space is derived from theory. So it's really not a definition, except maybe in the basic equations of relativity.



PS: That so derived space is continuous throughtout the universe as you state. There are no fields in GR- like no gravitational field. But if we adhoc superimpose EM fields on that space, they may not be continuous. At mirrors, there is always a miniscule amount that leaks through. But the magnitude of the fields changes abruptly at the surface of the mirror. So the field is discontinuous even though it can be said that a very small amonut of any field can penetrate the entire universe.

But bottomline, space is completely continuous and particle theory (fieldless) is completely descrete. Fields are neither continuous nor descrete. That is why it is so difficult to calculate anything using the field only approach.

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