When you consider an array or a space of n-dimensions the number n is often arbitrary because it is often only the number of aspects you chose to consider - length, width, depth but not time for example or name, address, phone number but not e-mail address.
It is easy to envision examples when one dimension might turn out to be empty such as projecting a 3-D space onto a 2-D map. Consider looking at a place on Google Earth - it is not real time but it is a particular time so there is a time dimension with only one possible value. If you look at a satellite image it is rendered in two dimensions on your computer screen but there is technology that can render the same satellite image in three dimensions on a membrane. If you look at the street map though, the dimension of depth becomes empty.
Donna [EMAIL PROTECTED] On 8-Oct-07, at 3:13 PM, Robert Bernecky wrote:
One approach I have used in this regard is to ask questions based on (Gasp!) reality:
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