Re: polred and variants

[Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>]

On Thu, Jan 22, 2026 at 09:18:59PM +0000, John Cremona wrote:
> Thanks Karim,
> 
> You answered all my questions.  (I do understand the difference
> between | and ||, that was just a slip.) I'm not even sure that I need
> the ring of integers.   (The fields in question are the Hecke
> eigenvalue fields of Bianchi modular forms, by the way).
> 
> When I searched through the pdf manual I did not notice that I reached
> a section on obsolete functions (yes, I see that the section heading
> is on the same page...).  But it is still true that there is no
> documentation in this manual for any non-obsolete *polred* functions.

The libpari manual is meant as a supplement to the User manual, not
as a standalone document. 
If you like more documentation on the spirit of PARI programming,
I can point you to this webpage
<https://pari.math.u-bordeaux.fr/Events/LIBPARI2025/>
and in particular to
"A brutal introduction to libpari programming"
<https://pari.math.u-bordeaux.fr/Events/LIBPARI2025/talks/intro.pdf>
which introduce the new gc_* gerepile replacement.

Cheers,
Bill.