Maxima has substituted a polynomial in "CRE" form for the some
variable. Since your expression
sin(x)^2 is not a quadratic in x, it has to do something more elaborate.
try using the lisp program pdisrep to see what that (g21359 1 1) means.
RJF
Andrew Yeltsin wrote:
> Hallo!
>
> I'm trying to build a "step-by-step-output" version of some Maxima
> functions
>
> In the case of simple equation we have such thing
> solve(x^2+3*x-2,x);
> a 1
> b 3
> c -2
> I called $tex In the function solvequad:
> (setq disc_out `((MPLUS SIMP) ((MEXPT SIMP) ,b 2.) ((MMINUS SIMP)
> ((MTIMES SIMP) 4. ((MTIMES SIMP) ,a ,c)))))
> (mfuncall '$tex '((MEQUAL SIMP) 'upper_d ((MEQUAL SIMP)
> ((MPLUS SIMP) ((MEXPT SIMP) 'b 2.) ((MMINUS SIMP) ((MTIMES SIMP) 4.
> ((MTIMES SIMP) 'a c))))
> disc_out)))
>
> The output was ok
> $${\it upper\_d}=\left(b^2-4\,a\,c=17\right)$$
>
> I tried a more complex equation
> solve(sin(x)^2-(a+1/2)*sin(x)+a*1/2=0,x);
>
> There was a variable substition somewhere, and in solvequad I got:
> a 2
> b (G21359 1 -2 0 -1)
> c (G21359 1 1)
>
> And in TeX function I've got such errors
>
> Maxima encountered a Lisp error:
> CAR: #:G21359 is not a list
>
> or
>
> merror(~:M evaluates to ~M~%Improper name or value in functional
> position.,
> g21359, 1)
>
> Maybe it is a silly question, but I'm not a lisp exrert.
> What is G21359 and how to make the output work with it?
>
>
> Andrew Yeltsin
>
> ???????? nigma.ru <http://nigma.ru>;
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