negative numbers and integer division

[Pettersen, Bjorn S]

> From: Matthew Wilson [mailto:mwilson at sarcastic-horse.com] 
>
> [timbot] 
> > Not really, but because the intended connection between 
> (-1, 2001) and
> > (11,
> > 2000) escapes me.  That is, I have no idea how to 
> generalize that.  For
> > example, is (0, 2001) OK as-is, or should that become (12, 
> 2000), or ...?
> 
> 
> I should have spelled out the goal.  I want to do stuff like this:
> 
> >>> dec99 = mdate(12,1999)
> >>> jan00 = dec99+1
> >>> nov99 = jan00 - 1
> >>> nov99
> (11,1999)
> 
> I want to add and subtract integers from my date structure as 
> if they were months.

hmmm 
  dec99+1 == jan00
  jan00-1 == nov99

new math?

-- bjorn