Re: Transpose[A]*A wrong?
- To: mathgroup at smc.vnet.net
- Subject: [mg41160] Re: [mg41129] Transpose[A]*A wrong?
- From: Bobby Treat <drmajorbob+MathGroup3528 at mailblocks.com>
- Date: Tue, 6 May 2003 05:59:23 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Transpose[A].A
Bobby
-----Original Message-----
From: Daniel Lidstrm <daniel.lidstrom at _DELETE_home.se>
To: mathgroup at smc.vnet.net
Subject: [mg41160] [mg41129] Transpose[A]*A wrong?
Hi,
why does Mathematica give the wrong result here?
In[1]:= \!\(A\ = \ {{x\_11, x\_12, x\_13}, {x\_21, x\_22, x\_23},
{x\_31,
x\_32,
x\_33}}\)
Out[1]= {{x , x , x }, {x , x , x }, {x , x , x }}
11 12 13 21 22 23 31 32 33
In[2]:= Transpose[A]*A
2 2
2
Out[2]= {{x , x x , x x }, {x x , x , x x }, {x x ,
x x
, x }}
11 12 21 13 31 12 21 22 23 32 13 31
23
32 33
Look at the diagonal elements for example.
Thanks!
/Daniel
--
Daniel Lidström
62 23' 25" N
17 15' 31" E