On Friday, September 6, 2019 at 1:19:48 AM UTC-7, Thierry
(sage-googlesucks@xxx) wrote:
>
>
> I would say that there is a bug in the 'default' algorithm. Note that
> changing the algorithm leads to:
>
> sage: A.echelon_form(algorithm='partial_pivoting')
> [ 1 0
Hi,
On Thu, Sep 05, 2019 at 06:33:34PM -0400, David Joyner wrote:
> On Thu, Sep 5, 2019 at 6:29 PM David Guichard
> wrote:
>
> > When is a linear system consistent?
> >
> > This isn't helpful:
> >
> > a,b,c=var('a b c')
> > A=matrix([[-4,5,9,a],[1, -2, 1, b],[-2,4,-2,c]])
> > A.echelon_form()
>
On Thu, Sep 5, 2019 at 6:29 PM David Guichard
wrote:
> When is a linear system consistent?
>
> This isn't helpful:
>
> a,b,c=var('a b c')
> A=matrix([[-4,5,9,a],[1, -2, 1, b],[-2,4,-2,c]])
> A.echelon_form()
> A.rref()
>
> [1 0 -23/3 0]
> [0 1 -13/3 0]
> [0 0
