Hi Barinder, On my system I get the same error messages as you (but no segmentation fault). This looks like a bug in PARI. It also happens with the built-in ellanalyticrank function in PARI:
gp> A = -17737878703644595885728157881856/2195118875780412735240966796875; gp> B = 76386743039924534000525642916220282669332545616695170155741184/4818546878807463076444691815463494370294881403446197509765625; gp> E = ellinit([A, B]); gp> ellanalyticrank(E) *** at top-level: ellanalyticrank(E) *** ^------------------ *** ellanalyticrank: overflow in t_INT-->ulong assignment. Do you want to file a PARI bug report? Best wishes, Peter Op woensdag 18 maart 2020 13:36:46 UTC+1 schreef Barinder Banwait: > > MWE: > > sage: A = -17737878703644595885728157881856/2195118875780412735240966796875 > sage: B = > 76386743039924534000525642916220282669332545616695170155741184/4818546878807463076444691815463494370294881403446197509765625 > sage: E = EllipticCurve([A,B]) > sage: lcalc.analytic_rank(E) > > This produces "*** overflow in t_INT-->t_INT assignment.Segmentation > fault (core dumped), followed by "TypeError: unable to convert '' to an > integer". It looks like line 385 of sage/lfunctions/lcalc.py is returning > the empty string, i.e., 'rank-compute' is failing to compute, probably > because of the overflow. > > This elliptic curve comes from Elkies and Klagsbrun's recent paper ( > https://arxiv.org/abs/2003.00077); it is the rank 20 curve with torsion > Z/2Z. > > Other info: > > OS: Ubuntu 18.04.2 LTS, 64bit > Sage installation: Downloaded and unzipped the top link here: > http://www.mirrorservice.org/sites/www.sagemath.org/linux/64bit/index.html > SageMath version 9.0, release date 2020-01-01 > Using Python 3.7.3 > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/fb89324a-91a6-4eea-ab06-be5c9d7b7140%40googlegroups.com.
