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Bill Allombert on Sat, 25 Mar 2023 23:29:13 +0100
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Re: from t_POL to t_CLOSURE (and back)
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- To: pari-users@pari.math.u-bordeaux.fr
- Subject: Re: from t_POL to t_CLOSURE (and back)
- From: Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>
- Date: Sat, 25 Mar 2023 23:27:58 +0100
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On Sat, Mar 25, 2023 at 05:54:10PM -0400, Max Alekseyev wrote:
> Is there any more straightforward/logical way than the following?
>
> ? p = x^3 + x + 1
> %1 = x^3 + x + 1
> ? type(p)
> %2 = "t_POL"
> ? f = z -> subst(p,variable(p),z)
> %3 = (z)->subst(p,variable(p),z)
> ? type(f)
> %4 = "t_CLOSURE"
> ? q = f('x)
> %5 = x^3 + x + 1
> ? type(q)
> %6 = "t_POL"
I do not know what is more straightforward/logical, but you can do
f(x)=eval(p)
Cheers,
Bill