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Re: Time To Be Treated As A Dimension Or As A Coordinate

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Posted by Harvey on January 8, 2002 15:12:21 UTC

This discussion has come up more than a few times on this forum, so I recently had the opportunity to ask Michael Turner (well-regarded general relativist) after a lecture whether time should be treated as a coordinate or whether time should be treated as a dimension.

He asked me what I meant by the these two terms. I said that by dimension I meant the ability to move about (i.e., time travel) and by coordinate I meant solely something that identifies a position within a frame of reference (i.e., no time travel since no future exists by which to travel to).

He then answered the question: time should be treated as a dimension.


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