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MathGroup Archive 2004

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Re: a bug in Det of complex matrix - Mathematica 5

  • To: mathgroup at smc.vnet.net
  • Subject: [mg45927] Re: a bug in Det of complex matrix - Mathematica 5
  • From: "Dr. Stefan P. Müller" <stefan.mueller at uni-essen.de>
  • Date: Thu, 29 Jan 2004 05:36:58 -0500 (EST)
  • References: <bv83db$ibs$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

appears to be fixed in 5.0.1 (Mac OS X):

1.+0. I

Stefan

In article <bv83db$ibs$1 at smc.vnet.net>, Petr Kujan <kujanp at fel.cvut.cz>
wrote:

> 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
>


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