Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2002
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2002

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Re: information on Eigensystem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg33617] Re: [mg33594] Re: information on Eigensystem
  • From: Bettina Hoser <Bettina.Hoser at em.uni-karlsruhe.de>
  • Date: Wed, 3 Apr 2002 18:08:23 -0500 (EST)
  • References: <22F60A7C-46E1-11D6-98F9-00039311C1CC@tuins.ac.jp>
  • Sender: owner-wri-mathgroup at wolfram.com

Thanks you for your comment, but I have made the mistake to hand-write 
the matrix, which means, that I originally used I instead of i in the 
notebook, so it is not the letter.
Is there any other solution?
Best regards,
Bettina

Andrzej Kozlowski wrote:
> The obvious answer is to replace i with I.
> 
> Andrzej Kozlowski
> Toyama International University
> JAPAN
> http://platon.c.u-tokyo.ac.jp/andrzej/
> 
> On Wednesday, April 3, 2002, at 03:13  PM, Bettina wrote:
> 
>> Hi
>> I have another question concerning Eigensystem: I try to get the
>> Eigensystem for heritian (complex) matrices. Following my test matrix
>> M={{65,3+6i,12-6i,4-2i},{3-6i,30,0,30},{12+6i,0,9,3},{4+2i,30,3,46}}.
>> But if I try to get Eigensystem[M] nothing comes up. What could be the
>> problem? I have already found out (archive) that there seem to be some
>> special effects when using Eigensystem on complex matrices, but these
>> messages dated from 1999 and 2000. Has anything changed since then? Is
>> there a way to solve my problem?
>> Thanks for help
>> Bettina
>>
>> Jens-Peer Kuska wrote:
>>
>>> Hi,
>>>
>>> the Numerical Recipes use the EISPACK code and one can't do better
>>> than to use EISPACK or the original ALGOL source for
>>> Wilinson/Reinsch.
>>>
>>> Regards
>>>   Jens
>>>
>>> Borut L wrote:
>>>
>>>> Hello,
>>>>
>>>> I am doing a comparison between three methods for finding an 
>>>> eigensystem of
>>>> a matrix, Numerical Recipes tqli + tred2, jacobi, and Mathematica's
>>>> Eigensystem[].
>>>>
>>>> I would like to acquire info on which algorithm does Mathematica 
>>>> have for
>>>> finding it out? What does she do in a case of a real symmetric 
>>>> matrix? I am
>>>> asking it because I haven't found anything in the implementation notes.
>>>>
>>>> Thank you for you time,
>>>>
>>>> Borut from Slovenia
>>>>
>>>
>>
>>
>>
>>


-- 
Dipl.-Phys. Bettina Hoser
Lehrstuhl für Informationsdienste und elektonische Märkte
Fakultät für Wirtschaftswissenschaften
Universität Karlsruhe (TH)
76128 Karlsruhe

email: bettina.hoser at em.uni.karlsruhe.de
Tel:   0721-608 8407
Fax:   0721-608 8403




  • Prev by Date: Re: Re: information on Eigensystem
  • Next by Date: Re: Re: information on Eigensystem
  • Previous by thread: Re: Re: information on Eigensystem
  • Next by thread: Re: Re: information on Eigensystem