Thanks Peter, I've just submitted a bug report to PARI/GP - Bug#2212.
Best wishes, Barinder On Fri, 20 Mar 2020 at 07:29, Peter Bruin <pjbr...@gmail.com> wrote: > 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 a topic in the > Google Groups "sage-devel" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/sage-devel/Fj7_fmJ613s/unsubscribe. > To unsubscribe from this group and all its topics, 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 > <https://groups.google.com/d/msgid/sage-devel/fb89324a-91a6-4eea-ab06-be5c9d7b7140%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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/CALFQ%3D--8mdJj8ThFwXbXyKGRdxR9N4FvwQTs3vUSFTM%3Dq91pYQ%40mail.gmail.com.
