On Wednesday 12 September 2007, Joel B. Mohler wrote:
> Hi,
>
> Consider the following:
>
> sage: x,y=ZZ['x,y'].gens()
> sage: f=(x+1)*(y+1)*(1-x*y)
> sage: f.factor()
> ...
> <type 'exceptions.TypeError'>: no conversion to a Singular ring defined
>
> It certainly seems to me that this should coerce just fine to a Singular
> ring. Is this a bug?

SINGULAR doesn't support ZZ as a base ring yet. There is some experimental 
code but nothing officially released yet. 

Martin

-- 
name: Martin Albrecht
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