ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Wed, 18 Jan 2023 14:44:51 +0100quasi-affine subvarietieshttps://ask.sagemath.org/question/65980/quasi-affine-subvarieties/I would like to set up a quasi-affine variety in $\mathbb{A}^2$ (over a field of characteristic zero). I contend with QQbar:
n=2
A.<x,y>= AffineSpace(QQbar, n)
X = Curve([y^2 -x^3], A)
$X$ is a affine variety. How did I remove one point at $(0,0)$ from $X$ which would result in a quasi-affine subvariety? What are the options in sagemath?
(By the way, I may choose CC or alternatively QQbar for the underlying field.)Wed, 18 Jan 2023 14:44:51 +0100https://ask.sagemath.org/question/65980/quasi-affine-subvarieties/