by "Jack" <jj@[EMAIL PROTECTED]
>
Apr 27, 2008 at 02:29 AM
>> c) y'-x'=y-x
>
> This makes no sense: what are x' and y'?
>
Given any positive integer i, if y-x=y'-x', then x' = x+ i and y'=y+i.
Blimey, I never knew this wasn't all understood by convention!
Cheers.
