On Jan 22, 11:21 am, David R Tribble <da...@tribble.com> wrote: > Tay wrote: > >> -1 *-1 = 1 huh? > >> It's so simple. > > Mensanator wrote: > > If North is positive and you're facing South, > > what's your displacement if you take a step backwards? > > One step? ;-) > > Perhaps you meant: if I'm standing at -1, the South pole, > and I move -1, one step backwards, what is my new location?
Nope, didn't mean that at all. I said "displacement", not location.
> > I guess that would depend on how large the world is.
Nope, not dependent on that at all.
> If half a step gets me to the North pole, then a full > step gets me back to the South Pole.
The displacement is still +1 even if you are returned to your starting point. When you take drive and eventually return, have you used any gas?
> > But why are you taking steps, which are additive instead of > multiplicative?
I was under the impression that multiplication was related to addition. How was I wrong?