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John S. Denker wrote:

> To repeat: -- Vectors in R^3 never have signs. -- Vectors in R^D
> never have signs, for any D>1.
>

I'm surprised by the exception of D=1. Should a "vector" in D=1 be
treated any differently? If you wish, in D=1, you might choose to only
discuss the components. But think a vector still only has direction and
magnitude.
--
Dr. James McLean phone: (716) 245-5897
Dept. of Physics and Astronomy FAX: (716) 245-5288
SUNY Geneseo email: mclean@geneseo.edu
1 College Circle
Geneseo, NY 14454-1401