Re: Vectors (other problem)

*To*: mathgroup at smc.vnet.net*Subject*: [mg13931] Re: Vectors (other problem)*From*: Harald Giese <giese at dkrz.de>*Date*: Tue, 8 Sep 1998 02:52:30 -0400*Organization*: Institut fuer Meereskunde, Universitaet Hamburg*References*: <6ssun9$m7p@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Olivier Georg wrote: > ... > 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." > ... Oliver, The Mathematica Help Browser would tell you, that "_ or Blank[ ] is a pattern object that can stand for any Mathematica expression. ..." It is not the sign for subscripts. Have a look at "Add-ons" -> "Extra Utilities" -> "Notation" (also in the online help) instead. It should be possible to link the Expression SubscriptBox["A", "0"] to A[[1]] an so on. Please note: A[[0]] is the head of expression A (in this case "List"). -Harald -- Harald Giese Email: giese at dkrz.de Phone: +49 (0)40 4123 5796; Fax: +49 (0)40 5605724 Institut fuer Meereskunde der Universitaet Hamburg (Institute of Oceanography of the University of Hamburg) Troplowitzstrasse 7, D-22529 Hamburg