On May 22, 4:16 am, Martin Albrecht <m...@informatik.uni-bremen.de>
wrote:
> On Friday 22 May 2009, John Cremona wrote:
>
> > There are 3 conventions for the degree of the 0 polynomial, none of which
> > is 0:
>
> > (1) None (a bit lazy and hard to work with in most non-python languages)
> > (2) -1 (rather arbitrary, I think, it just has the useful property
> > of being strictly less than any other degree)
> > (3) -Infinity (less arbitrary, also less then any other degree, makes
> > formulas like deg(fg)=deg(f)+deg(g) work in all cases, and fits in
> > best with more highbrow concepts such as valuations).
>
> IIRC we had this discussion a while back and settled for -1 for performance
> reasons. I can't find that old discussion now though.
I think it's here:
http://groups.google.com/group/sage-devel/browse_thread/thread/5da37697486b4c58/f12287f00af7e8a1?hl=en&tvc=2&q=degree+laurent#f12287f00af7e8a1
John
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