solution of system of quadratic eqns



On 6/23/2012 8:19 AM, Richard Fateman wrote:
....

> For what it is worth, the commercial Macsyma does this without 
> difficulty. It seems to use
> a grobner basis algorithm, but the default is a triangularization method.
....
It turns out that if I set use_grobner: false, then it uses a resultant 
method and algsys returns
empty, same as Maxima.

So I was wrong in thinking this could not have been a bug in old systems.

I still think that resultants should work if some bug were removed, but 
so can Grobner bases; the fastest should
be triangularization, if it is applicable.

RJF