[Maxima] How to compose multi-variate polynomials?
Jonathan LF King
squash at math.ufl.edu
Sun May 7 13:06:41 CDT 2006
Dear Barton Willis
From: Barton Willis <willisb at unk.edu>
Date: Sun, 7 May 2006 06:10:04 -0500
> Q2: How can I define a poly f, so that f is
> viewed as a 1-variable function, but the variable comes from,
> say, 3-dim'al space and the output is a point in
> 3-dim'al space? So, for instance, I can write
> f(f(f([1,2,3]))) ?
> (...except that the input-point [1,2,3] might be
> some other kind of Maxima object other than a list.)
Maybe you want to do something like:
(%i1) f(x) := block([x1 : part(x,1), x2 : part(x,2)], [-x2, -x1]);
I will look up the "part" operator.
The function 'part' can be applied to (I think) any
non-atomic object, so maybe something like this would
work if the input to f was not a list. Does this help,
or did I misunderstand?
Good luck with your project.
Thank you. At the moment, the students are away are summer
break. They are a lot more computer-savvy than I am...
Prof. Jonathan LF King Mathematics dept, Univ. of Florida
<squash at math.ufl.edu>, <http://www.math.ufl.edu/~squash/>
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