Changes between Version 7 and Version 8 of Ticket #15299


Ignore:
Timestamp:
Oct 17, 2013, 9:39:06 PM (9 years ago)
Author:
Jeroen Demeyer
Comment:

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  • Ticket #15299 – Description

    v7 v8  
    11See [https://groups.google.com/forum/#!topic/sage-support/rYQ4rWyncG4]
    2 
    32{{{
    4 sage: E=EllipticCurve(QQ,[0, 0, 1, -79, 342]); E.sha().an(),E.sha().an_numerical()
     3sage: E = EllipticCurve(QQ,[0, 0, 1, -79, 342]); E.sha().an(),E.sha().an_numerical()
    54(0, 1.00000000000000)
    65sage: E.lseries().deriv_at1(100*sqrt(E.conductor()) + 10)  # L1, error_bound
     
    87}}}
    98
    10 This seems to be due to inappropriate use of Python floats instead of more precise real numbers.
     9This seems to be due to inappropriate use of Python floats instead of more precise real numbers. After the patch:
     10{{{
     11sage: E = EllipticCurve(QQ,[0, 0, 1, -79, 342]); E.sha().an(),E.sha().an_numerical()
     12(1.00000000000000, 1.00000000000000)
     13sage: E.lseries().deriv_at1(100*sqrt(E.conductor()) + 10)  # L1, error_bound
     14(-4.32787398660869448751904675450772492666840247314688171540527473331725818170217268435223462033366791557160872926179439894639315476270837428785657638252738603056742447337636326343956370276624493916496382120766160023620812331280787034239648552009947468067829864968026720015203778821069593806584e-277,
     15 1.82478252137476307223140369768561190028055347258560054363485475966241792307587640145132294203994875344783110100551912347495775160520204557245032474939095251969168953786545612090565728262067746413119194690260652692254781091147749697957445424152473292233020112755190503925812425294821095313979e-270)
     16}}}