Ramón Casero Cañas on Thu, 23 Jan 2003 16:46:09 +0100 (MET)


[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]

Re: how to know whether a matrix is invertible


> On Thu, Jan 23, 2003 at 02:34:40PM +0100, Ramón Casero Cañas wrote:
> > I would like to know whether a matrix is invertible, I'm using ginv(),
> but
> > if it's not, the library issues an error message and exits. I considered
> > computing the determinant, but det() and det2() have the same problem.
> Is there a
> > way to check this in PARI without an error and exit?
> 
> det() should works. The error message is probably because your input is
> incorrect.
> Please always report the error message.

It was a misplaced line in the code. The input was correct, but the check
was not in the right place. Sorry.

Ramón.

-- 
+++ GMX - Mail, Messaging & more  http://www.gmx.net +++
NEU: Mit GMX ins Internet. Rund um die Uhr für 1 ct/ Min. surfen!