Changes between Initial Version and Version 8 of Ticket #9322


Ignore:
Timestamp:
09/16/11 10:18:42 (10 years ago)
Author:
zimmerma
Comment:

thank you John for your advice. After trying it, I figured out that with Sage 4.7.1 on my laptop in fact the example in the description actually works, but takes about 2.5 minutes, during which top reports that the gp process takes 100% of the cpu time, while evaluating the command

ans=bnfellrank(K, [-a + 2,3*a + 18,9*a + 209,175*a + 2581,-55*a + 852]);;

Can someone else confirm? Maybe a problem in the Sage-gp interface? What should we do with that ticket?

Paul

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  • Ticket #9322

    • Property Status changed from new to needs_info
    • Property Cc jeremywest added
    • Property Milestone changed from to sage-4.5
    • Property Component changed from algebra to elliptic curves
    • Property Summary changed from bug in simon_two_descent for elliptic curves to long time in simon_two_descent for elliptic curves
    • Property Keywords Simon added
  • Ticket #9322 – Description

    initial v8  
    1 [NB This is a different bug from the one on #5153]
     1[NB This is a different problem from the one on #5153]
    22
    33Chris Wuthrich reports:
     
    88[]
    99sage: E.simon_two_descent(verbose=2)
    10 booom.
    1110}}}
     11This takes about 2.5 minutes with Sage 4.7.1 on a 1.6Ghz Core 2 Duo.
    1212
    1313The same example runs fine in gp using the same version of the script ell.gp that Sage has (in version 4.4.4) and the same version of gp.