Re: [Maxima-discuss] integerp(factor(-2)) = false => grumble

[Stavros M. <mac...@gm...>]

Maybe define another value of *factorflag*?


On Fri, Dec 27, 2024, 09:08 Barton Willis via Maxima-discuss <
max...@li...> wrote:

> This morning, integerp(factor(-2)) = false tripped me up.  I traced
> integerp and that appeared normal. Of course,  the problem is that
> internally factor(-2) is  the unsimplified expression
> ((MTIMES SIMP FACTORED) -1 2).
>
> My code was doing [αα,aa,bb,ff] : map('factor, subst(sol, [α,a,b,f])). In
> my testing, α  was rarely a composite integer (or negative), so the bug
> in my code showed infrequently.
>
> Other than using  featurep(X,'integer) or doing a post factor call to
> expand(X,0,0), do we have a workaround?
>
>
> --Barton
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