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Hi,

Besides, the very fact of using the 0 -- be it for
forward or for backward indexing -- destroys symmetry:
(negatives ballance with positives, 0 stands for itself).
True symmetry is chimeric here, regardles of 0/1-based
indexing.

With floating-point or sign-bit arithmetic, you can use +/-0!

This might be the first time in history that someone found a good use for +/-0... :)

[]s,
Diego.