On Tue, Dec 28, 2010 at 8:38 PM, Rob Beezer wrote:
> sage: A=matrix(QQ,2,range(4))
> sage: B=matrix(ZZ,2,range(4))
> sage: C=A.echelon_form()
> sage: D=B.echelon_form()
> sage: C.is_mutable()
> True
> sage: D.is_mutable()
> False
>
> Should C and D be different with regard to mutability? If not,
sage: A=matrix(QQ,2,range(4))
sage: B=matrix(ZZ,2,range(4))
sage: C=A.echelon_form()
sage: D=B.echelon_form()
sage: C.is_mutable()
True
sage: D.is_mutable()
False
Should C and D be different with regard to mutability? If not, should
both results be immutable? (I'd rather not have to handle both
