Re: how to know whether a matrix is invertible

[Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>]

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.

Cheers,
Bill