Thanks, Barton (and Robert)! I didn't know about matrix_element_mult. It's
precisely what the doctor ordered.
Viktor
-----Original Message-----
From: Barton Willis [mailto:willisb at unk.edu]
Sent: Saturday, November 15, 2008 5:14 PM
To: Viktor T. Toth
Cc: 'Robert Dodier'; 'van Nek'; Maxima at math.utexas.edu
Subject: Re: [Maxima] vector times vector; vector^-1?
-----maxima-bounces at math.utexas.edu wrote: -----
>To be clear about it, what I am proposing is that (optionally, perhaps)
>
>[a,b].[c,d]
>
>should return
>
>a.c + b.d
>
>instead of
>
>ac + bd
Try this:
(%i1) matrix_element_mult : "."$
(%i2) [a,b] . [c,d];
(%o2) b . d + a . c
Barton