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MathGroup Archive 1998

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Re: Vectors (other problem)

  • To: mathgroup at smc.vnet.net
  • Subject: [mg13918] Re: [mg13895] Vectors (other problem)
  • From: "Jens-Peer Kuska" <kuska at linmpi.mpg.de>
  • Date: Mon, 7 Sep 1998 01:22:43 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

Hi

 if  You say

 A={Subscript[A,0],Subscript[A,1],Subscript[A,2]}


The assignment gets evaluated and
in the symbol a in the subscript argument gets replaced by its value
{Subscript[A,0],..}, the A in this Subscript argument is evaluated next
and replaced by {Subscript[A,0],..} ... and so on. Thats why You get a
recursion error. It is just like the GNU name that stands for "GNU is
Not Unix" -- take a pice of paper and try to write the sentens with
expanded GNU's.

Ok --- take five weeks with "The Book".

Hope that helps
  Jens

-----Original Message-----
From: Olivier Georg <ogeorg at imtsg12.epfl.ch> To: mathgroup at smc.vnet.net
Subject: [mg13918] [mg13895] Vectors (other problem)


>Hi again,
>
>This time, I have a vector I name A, and I would like to name its
>components A_0 (i.e. {Subscript[A, 0]), A_1 and A_2:
>
>      / A_0 \
>  A = | A_1 |
>      \ A_2 /
>
>but I get:
>
>$RecursionLimit::"reclim": "Recursion depth of \!\(256\) exceeded."
>$RecursionLimit::"reclim": "Recursion depth of \!\(256\) exceeded."
>$RecursionLimit::"reclim": "Recursion depth of \!\(256\) exceeded."
>General::"stop": "Further output of \!\($RecursionLimit :: \"reclim\"\)
>will be suppressed during this calculation."
>
>Why ???
>
>Please e-mail, thanks,
>
>Olivier
>
>--
>--------------------------------------------------------------------- |
>Olivier Georg       \__  e-mail:    olivier.georg at epfl.ch         | |
>Ch. de Montelly 43c    \__  home:   http://imtsg7.epfl.ch/~ogeorg | |
>1007 Lausanne/Switzerland \__  tel: +41 21 693 58 50 (work)       |
>-------------------------------\__    +41 21 626 51 79 (private)    | |
>Heb Deh Hag Heb Warhoaz       \__-------------------------------- |
>Hirio Ne Dalv Ket C'Hoaz         \__       ________    __o      | |
>( Sans hier et sans demain )      \__      _____   _`\<,_     | |     (
>Aujourd'hui ne vaut rien )         \__      ___ (_)/ (_)    | |
>"Kinnig", Per Jakez Helias    \                     |
>---------------------------------------------------------------------
>
>



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