Re: Transpose[A]*A wrong?
- To: mathgroup at smc.vnet.net
- Subject: [mg41182] Re: Transpose[A]*A wrong?
- From: "Bill Bertram" <wkb at ansto.gov.au>
- Date: Tue, 6 May 2003 06:05:23 -0400 (EDT)
- Organization: Australian Nuclear Science and Technology Organisation
- References: <b950vl$r49$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
"Daniel Lidström" <daniel.lidstrom at _DELETE_home.se> wrote in message news:b950vl$r49$1 at smc.vnet.net... > Hi, > > why does Mathematica give the wrong result here? > > In[1]:= \!\(A\ = \ {{x\_11, x\_12, x\_13}, {x\_21, x\_22, x\_23}, {x\_31, > x\_32, Daniel, An common error this one! What you want is not Transpose[A]*A but Transpose[A] . A ie. the Dot product! Bill