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Implement functionality to bound from above the analytic rank of a rational elliptic curve. This uses the zero sum method as described in [http://msp.org/obs/2013/1-1/obs-v1-n1-p07-s.pdf]. Because this avoids computing with the curve's L-function directly, it is often faster than traditional analytic rank techniques. The enhancement also includes functionality to compute more general zero sums for an elliptic curve L-function, as well as computing with the logarithmic derivative. The elliptic_curves object in Sage has also been modified to contain examples of elliptic curves up to rank 28. To this end the elliptic_curves spkg has been updated to version 0.8. The zipped data file for the spkg can be obtained at [http://www.math.washington.edu/~mlungu/files/elliptic_curves-0.8.tar.bz 2] Complete working sage install with docs built: [https://cloud.sagemath.com/projects/8499bab7-d4a5-4956-acd2-248b5550731 d/files/sage/] Built HTML documentation files (as public, this will work later this week, but not now...) [https://cloud.sagemath.com/8499bab7-d4a5-4956-acd2-248b5550731d/raw/sag e/src/doc/output/html/en/reference/lfunctions/sage/lfunctions/zero_sums. html#sage.lfunctions.zero_sums.LFunctionZeroSum] [https://cloud.sagemath.com/8499bab7-d4a5-4956-acd2-248b5550731d/raw/sag e/src/doc/output/html/en/reference/plane_curves/sage/schemes/elliptic_cu rves/ell_rational_field.html#sage.schemes.elliptic_curves.ell_rational_f ield.EllipticCurve_rational_field.analytic_rank_upper_bound] URL: http://trac.sagemath.org/16773 Reported by: spice Ticket author(s): Simon Spicer Reviewer(s): William Stein
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tarball=elliptic_curves-VERSION.tar.bz2 | ||
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0.7 | ||
0.8 |
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from sympow import sympow | ||
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from zero_sums import LFunctionZeroSum |
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