Re: a bug in Det of complex matrix - Mathematica 5
- To: mathgroup at smc.vnet.net
- Subject: [mg45909] Re: a bug in Det of complex matrix - Mathematica 5
- From: drbob at bigfoot.com (Bobby R. Treat)
- Date: Thu, 29 Jan 2004 05:35:14 -0500 (EST)
- References: <bv83db$ibs$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
That's not the answer I get here, in Mathematica 5.0.1:
mat = {{-1., 1. - 1.*I},
{-1., -1.*I}};
Det[mat]
1. + 0.*I
That's correct.
Bobby
Petr Kujan <kujanp at fel.cvut.cz> wrote in message news:<bv83db$ibs$1 at smc.vnet.net>...
> In Mathematica 5.0:
>
> (* ERROR *)
> mat = {{-1., 1.- 1. I}, {-1., -1. I}};
> Det[mat]
>
> (* Out[1]= -1. + 1. I *)
>
>
> (* CORRECT *)
> rmat = Rationalize[mat];
> Det[rmat]
>
> (* Out[2]= 1 *)
>
> -------
> Petr