Kevin Ryde on Mon, 21 Sep 2015 11:18:41 +0200


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Re: discriminant of quad


Kurt Foster <drsardonicus@earthlink.net> writes:
>
> ? n.pol
> %4 = x^2 + 3

Ah, I see that's the poly of the quad basis, so not the same as
charpoly().

Karim Belabas <Karim.Belabas@math.u-bordeaux.fr> writes:
>
> But I see none of these two are documented, I'll fix that.

Perhaps a couple of words in the quadratic numbers introduction (the GP
bit) where discriminants are described.  Could have a brief
cross-reference under quadgen() too as that could show up in the help
system rather than reading the whole.