#11683: ell_curve_isogeny initialization
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Reporter: saraedum | Owner: cremona
Type: enhancement | Status: needs_info
Priority: minor | Milestone: sage-5.0
Component: elliptic curves | Keywords: startup,
initialization, sd32, sd35
Work_issues: | Upstream: N/A
Reviewer: Julian Rueth, Frithjof Schulze | Author: Julian Rueth,
John Cremona
Merged: | Dependencies:
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Comment(by cremona):
Replying to [comment:23 fschulze]:
> The documentation for Psi is missing some of the information from your
comment above: It states the places of bad reduction of E_t but doesn't
mention that E_t is a 'universal elliptic curve with l-isogeny' and that
the model was specifically chosen for it's reduction behaviour. Shouldn't
this information also be in the docstring?
>
You may be right, but it's a docstring not a textbook or thesis...we are
currently finishing similar (though more complicated) code for all the
cases where X_0(l) is hyperelliptic, and also getting these genus 0 cases
to apply in characteristics 2 and 3, so there will be a lot more to say
then (at which point we'll move this code into a separate file too).
> Everything else looks OK (with the doctests still running).
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11683#comment:24>
Sage <http://www.sagemath.org>
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