#10256: make -1 modular symbols from eclib available to elliptic curves
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Reporter: wuthrich | Owner: cremona
Type: enhancement | 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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This ticket is a follw-up from #10236. In there certain changes from #9476
and #9247 were reverted back. Here is what has to be done to make modular
symbols with negative sign available for computations with elliptic
curves, e.g. p-adic L-series.
Currently eclib can compute the space of modular symbols of sign = -1, but
ECModularSymbol in sage.libs.cremona.newforms.pyx can not use them yet to
compute {0,r}-
Once this is there, one can modify
sage.schemes.elliptic_curves.ell_modular_symbols.py to allow sign = -1 in
ModularSymbolECLIB. (Where one has to think a little bit about the
normalization.) This would allow to switch in line 1098 of
ell_rational_field.py and in line 131 of padic_lseries.py to make
use_eclib=True to be default.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10256>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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