GCD

[Keith Wansbrough]

>     Simon> 	gcd x y is the greatest POSITIVE integer that divides
>     Simon> both x and y.
> 
> I find it confusing to read a definition which contains redundant
> information. Instead, I'd suggest to add something like:
> 
>   "Note: this number is always positive"

Or, perhaps easier on the eye,

  "gcd x y is the greatest (positive) integer that divides both x and y."

--KW 8-)

-- 
Keith Wansbrough <kw217@cl.cam.ac.uk>
http://www.cl.cam.ac.uk/users/kw217/
University of Cambridge Computer Laboratory.