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

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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.


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