#10888: problem in evaluation dual isogeny
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Reporter: wuthrich | Owner: cremona
Type: defect | Status: new
Priority: major | Milestone:
Component: elliptic curves | Keywords: isogenies,
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by wuthrich):
John, thanks to your link I found quickly what is the problem. Consider
{{{
f(2,3)
f(x=2,y=3)
f.subs(x=2,y=3)
}}}
The first returns an element in the base ring, while the others are still
polynomials. This is correct with respect to the documentation apart from
the middle one. {{{f(x=2,y=3)}}} is the {{{__call__}}} method and there,
in the first lines, it jumps to execute {{{subs}}}.
So something has to be changed there. I am uncertain what. I attach a
patch that changes {{{__call__}}} to make it coherent with the
documentation, but it is not ready for review because it will most
certainly produce many problems in other places...
I will aks this to sage-devel.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10888#comment:4>
Sage <http://www.sagemath.org>
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