Help with using CAS math like Maxima?

[fcanatay at gmail.com]

I don’t know if you are using this notation intentionally, but the symbol for matrix multiplication in maxima is a “dot” as in “full stop”, not “\cdot” as your picture seems to show. When you use “\cdot”, maxima does component-wise multiplication.

Similarly, maxima uses “^^n”, not “^n”, for raising a matrix to n'th power. So, your matrix to the power of -1 in lyx is not the matrix inverse for maxima, if your intention was inverting the matrix. With “^-1", maxima calculates component-wise inverses (reciprocals).

Fatihcan


> The segment about it in the math lyx guide is quite lacking, and even so, I
> managed to configure Maxima correctly and created a shortcut for "maxima
> simplify".
> 
> When I use it for multiple things, it doesn't work:
> I want it to solve integrals and matrix algebra, including RREF and matrix
> multiplication, as well as different decompositions of matrices.
> Here's what I get when I try those things:
> [image: image.png]
> 
> The matrices are in pmatrix if it changes anything.
> 
> Simple numerical calculations, limits, sums, the determinant, and things
> like solve and powerseries command seem to work (also, where can I get a
> list of all those built-in functions?).
> 
> Also, the integral examples here are directly from the math guide and don't
> seem to work (while tinkering with this, it seemed like big Pi products
> also don't work - but it's way more niche, so not that important for me
> right now).
> 
> Any idea how to correct this and make it work as intended?
> 
> 
> Thanks for your help in advance,
> 
> Matan.