No problem with Singular 4.3.2 included in sage (on mac).
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Thanks. It looks like the error occurs in integralbasis.lib. It's last
version data is fairly recent, so the file may be under active maintenance.
sagemath has grown enough divisor machinery that it can probably compute a
conic model of a genus 0 curve, which would be more standard to try and
The following code raises a SingularError in SageMath version 10.4.beta3
(with system singular enabled), and the same at
https://sagecell.sagemath.org/ :
R. = QQ[]
f = -2*x^2*y^2 - x^3 - x^2*y + x*y^2 + y^3 + 2*x^2 + 2*y^2 - 2
C = Curve(f)
assert C.genus() == 0
If the recent xz backdoor drama didn't induce enough paranoia in you,
here is a second chance exception:
https://www.theregister.com/2024/04/16/xz_style_attacks_continue/
Open sourcerers say suspected xz-style attacks continue to target maintainers
Social engineering patterns spotted across
