Thank you very much for your message. I used simon_two_descent(), for [0,0,0,- 9588522241, 399039337488961], but Sage says " name 'ans' is not defined". I do not know what 'ans' is. Best, Raman
On 2/6/14, William Stein <[email protected]> wrote: > On Wed, Feb 5, 2014 at 1:06 PM, raman kurdi <[email protected]> > wrote: >> Hi Sage, >> >> I have some curves with rank at least 4. But I can not compute the >> rank by Mwrank. I use (' -p 200 -v 0'). >> Could you please help me? >> > > You might find this example useful, which shows your first curve has rank > 5. > > sage: E = EllipticCurve((0, 0, 0, -591361, 144600625)) > sage: %time E.simon_two_descent() # output implies rank of 2-selmer is > 5... > CPU times: user 744 ms, sys: 40 ms, total: 784 ms > Wall time: 1.99 s > (5, > 5, > [(281 : 785 : 1), > (600 : 2405 : 1), > (625 : 4375 : 1), > (719 : 9545 : 1), > (769 : 12025 : 1)]) > sage: E.root_number() # means rank is odd > -1 > > The algorithm used by simon_two_descent is different than the one in > mwrank, and works better to get info about the rank in some cases. > > William > >> Best, >> Raman >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sage-support" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/sage-support. >> For more options, visit https://groups.google.com/groups/opt_out. > > > > -- > William Stein > Professor of Mathematics > University of Washington > http://wstein.org > > -- > You received this message because you are subscribed to the Google Groups > "sage-support" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sage-support. > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/groups/opt_out.
