Re: [Maxima-discuss] How to check if a function is used in expression?

[Robert D. <rob...@gm...>]

On Sun, Jan 2, 2022 at 7:12 PM Oleg Melnikov <xi...@gm...> wrote:

> PDF_Prod:product(PDF(X[i],mu,v), i, 1, 5)$
> PDF_Sum: sum(exp(sum(-(X-mu)^2, i, 1,5)/(2*v))/(sqrt(2*pi*v)), j,1,1)$

I would write those a little differently.

PDF_Prod: 'product(PDF(X[i],mu,v), i, 1, 5);
PDF_Sum: 'sum(exp('sum(-(X[i]-mu)^2, i, 1,5)/(2*v))/(sqrt(2*pi*v)), j,1,1);

then freeof('product, PDF_Prod) and freeof('sum, PDF_Sum) both return false.

I put X[i] instead of X in PDF_Sum. Not sure about the summation over
j , I don't see a term which depends on j.

best,

Robert