#12356: many missing class number 2 orders in CM j-invariant function over
quadratic fields
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Reporter: cremona | Owner: cremona
Type: defect | Status: new
Priority: major | Milestone: sage-5.0
Component: elliptic curves | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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In sage/schemes/elliptic_curves/cm.py there is a list of imaginary
quadratic orders with class number 2, introduced in #11220, but it is
incomplete! Firstly, discriminant -72 is missing since the paper referred
to omitted it in error; secondly, all 9 such orders whose maximal order
has class number 1 were omitted by mistake.
A patch will be provided shortly.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12356>
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