Subject: Relativistic addition of velocities in wxMaxima
From: Robert Dodier
Date: Mon, 23 Sep 2013 19:12:54 +0000 (UTC)
On 2013-09-19, Jon Fleming <jonf at fleming-group.com> wrote:
> In wxMaxima I have, after pressing <Ctrl-R>:
>
>| load(vect);
>| u: [-3.84,0,0];
>| v: [0,0,3.84];
>| c: 299792.458;
>| CPsquared(v1, v2) := (v1 . v1)*(v2 . v2) - (v1 . v2)^2;
>| addrelativistic(v1, v2) := sqrt(((v2 - v1) . (v2 - v1) - CPsquared(v1, v2)/c^2)/(1 - (v2 . v1)^2/c^2)^2);
>| tellsimpafter: circular rule attempted.
>| -- an error. To debug this try: debugmode(true);
I gather that ctrl-R tells wxMaxima to reevaluate all cells. One of them
is load(vect), but 'vect' defines some simplification rules and if you
load it twice, the second time through you get the error about the
circular rule. There's certainly no harm in reevaluating the other
cells -- maybe you can put everything but load(vect) into a script,
then execute load(vect) once, then batch(yourscript) multiple times.
Just guessing, I don't know what you need to accomplish.
best
Robert Dodier