Vectors
- To: mathgroup at smc.vnet.net
- Subject: [mg13894] Vectors
- From: Olivier Georg <ogeorg at imtsg12.epfl.ch>
- Date: Sun, 6 Sep 1998 02:55:31 -0400
- Organization: EPFL
- Sender: owner-wri-mathgroup at wolfram.com
Hi, I want to do symbolic calculation with vectors, in particular, I want to do a vector product. But if I declare: A = (a b c) and do A x A (which should give zero), but instead I get: Cross::"nonn1": "Not all of the arguments are vectors of required length since there's no way for mathematica to know that a, b and c represent numerical value and not functions or lists. Is there a way around to perform this kind of calculation ? Please e-mail also, 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 \ | ---------------------------------------------------------------------