#10236: bug in modular symbols for elliptic curves
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Reporter: wuthrich | Owner: cremona
Type: defect | Status: new
Priority: major | Milestone: sage-4.6.2
Component: elliptic curves | Keywords: modular symbols
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by wuthrich):
On the way I found what the second patch in #9476 (changeset 14823) did. I
have to revert that. It is true that eclib has now negative spaces, but
the call function for negatives is not implemented in newforms.pyx. So as
it was until now, E.modular_symbol(use_eclib=True, sign=-1)(r) will
compute the + modular symbol. I am sorry that I did not take a look at
#9476. Hence I will also revert the part of #9247 that made eclib to be
chosen by default in p-adic L-functions.
I will open a separate ticket for changing this afterwards.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10236#comment:4>
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