On Mon, 28 Jan 2002, Petro wrote:
> I'm no freaking good at math, but I suspect that the volume of a
> sphere with a core removed is equal to a an uncored sphere of the same
> height.
When you remove the core it is no longer a sphere, it may fit inside a
sphere but the object itself is NOT a sphere. It's a toroid/donut if the
core goes all the way through. I'm not aware of a specific name for a
partial coring.
You can't take a sheet w/o a hole and a sheet w/ a hole and convert them.
They are topologically different objects.
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