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Originally Posted by Ian Goddard
I disagree and believe only one of the two expansion models I've defined above comports to a "center of expansion." Just because an object has a center does not mean it can only exapand from its center.
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Not really, I said: "Imagine a checker board, or metric, spread across all space..." That onto which the checker-board metric is being mapped is "all space," and the edges of all space are unknown.
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Yes, but the edges of a checker board are known, and they are straight. The center of a checker board is also known, and it is at an equal distance from all 4 corners.
Even if you try to expand the edges of a checker board so large we can’t see the edges, your defining it as a “checker board” tells us what its edges look like. Trying to hide the edges by putting them at a great distance does not do away with the "checker board's" center.