Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Heegner point_exact is wrong for 5077a with discriminant -7 #9302

Closed
williamstein opened this issue Jun 22, 2010 · 4 comments
Closed

Heegner point_exact is wrong for 5077a with discriminant -7 #9302

williamstein opened this issue Jun 22, 2010 · 4 comments
Assignees
@JohnCremona
Labels
c: elliptic curves p: major / 3 t: bug
Milestone
sage-4.5.2

Comments

@williamstein
Copy link
Contributor 

sage: E = EllipticCurve('5077a')
sage: E.heegner_discriminants(100)
[-3, -4, -7, -19, -40, -47, -55, -59, -71, -79, -84, -88]
sage: P = E.heegner_point(-7)
sage: P.numerical_approx(prec=100)
(0 : 1.0000000000000000000000000000 : 0)
sage: P.point_exact(prec=100)
(0 : 2 : 1)

But point_exact should be the point at infinity.

Component: elliptic curves

Author: Robert Bradshaw

Reviewer: William Stein

Merged: sage-4.5.2.alpha0

Issue created by migration from https://trac.sagemath.org/ticket/9302
@williamstein williamstein added this to the sage-4.5.2 milestone Jun 22, 2010
@robertwb
Copy link
Contributor

comment:1

Attachment: 9302-heegner.patch.gz

@loefflerd
Copy link
Mannequin

loefflerd mannequin commented Jun 29, 2010

Reviewer: William Stein

@loefflerd
Copy link
Mannequin

loefflerd mannequin commented Jun 29, 2010

Author: Robert Bradshaw

@qed777
Copy link
Mannequin

qed777 mannequin commented Jul 20, 2010

Merged: sage-4.5.2.alpha0

@qed777 qed777 mannequin removed the s: positive review label Jul 20, 2010
@qed777 qed777 mannequin closed this as completed Jul 20, 2010
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees

@JohnCremona JohnCremona

Labels
c: elliptic curves p: major / 3 t: bug
Projects
None yet
Milestone
sage-4.5.2
Development

No branches or pull requests
3 participants
@robertwb @williamstein @JohnCremona