Re: *newbie* output of ScalarTripleProduct
- To: mathgroup at smc.vnet.net
- Subject: [mg106762] Re: *newbie* output of ScalarTripleProduct
- From: "Sjoerd C. de Vries" <sjoerd.c.devries at gmail.com>
- Date: Sat, 23 Jan 2010 07:30:11 -0500 (EST)
- References: <hjbvbk$2st$1@smc.vnet.net>
You made an error while copying: the part which reads r2-r2 should
read r2 - r1
Cheers -- Sjoerd
On Jan 22, 12:40 pm, pippo <marco.... at email.it> wrote:
> I'm (almost) new to mathematica ...
> I coped this from some tutorial ...
>
> Needs["VectorAnalysis`"]
> r1 = {1, -3, 2}
> r2 = {3, 7,-5}
> r3 = {4, 1, 6}
> r={x,y,z}
> ScalarTripleProduct[r-r1,r2-r2,r3-r1]==0
>
> the output i get is:
> Out[6]= True
>
> :-(
>
> What am I missing ?
>
> Thank you