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a bug in Det of complex matrix - Mathematica 5

• To: mathgroup at smc.vnet.net
• Subject: [mg45879] a bug in Det of complex matrix - Mathematica 5
• From: Petr Kujan <kujanp at fel.cvut.cz>
• Date: Wed, 28 Jan 2004 05:19:25 -0500 (EST)
• Reply-to: kujanp at fel.cvut.cz
• Sender: owner-wri-mathgroup at wolfram.com

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

• Follow-Ups:
  • Re: a bug in Det of complex matrix - Mathematica 5
    • From: Murray Eisenberg <murray@math.umass.edu>