attrib isSB for maxideal(n); and variables(I);

[gorzel]

The ideals return by maxideal and variables are always a std-basis.

So, by default, Singular could set attrib("isSB") to 1.

> ring r=0,(x,y,z),dp;
> ideal I = x,y,z;   
> vdim(I);
// ** I is no standard basis   // OK
1
> vdim(maxideal(2));  
// ** _ is no standard basis
4
> attrib(maxideal(2));     // This cuould be set.
no attributes

> ideal I = z,y2+z2;
> variables(I);
_[1]=y
_[2]=z
> attrib(variables(I));
no attributes
> mult(variables(I));
// ** _ is no standard basis
1

[hannes]

fixed with revision 14056