#6237: repeated roots with roots(CDF, multiplicities=False)
------------------------------+---------------------------------------------
Reporter: ncalexan | Owner: somebody
Type: defect | Status: new
Priority: major | Milestone: sage-4.0.2
Component: basic arithmetic | Keywords: roots CDF multiplicities
Reviewer: | Author:
Merged: |
------------------------------+---------------------------------------------
{{{
sage: pari('v')
v
sage: pari('u')
u
sage: u = QQ['u'].0
sage: v = QQ['u']['v'].0
sage: f = v^3 - u^7 + 2*u^3*v
sage: f.discriminant()
-27*u^14 - 32*u^9
sage: f.discriminant().roots(CDF, multiplicities=False)
[-1.03456371594,
0,
0,
0,
0,
0,
0,
0,
0,
0,
-0.31969776999 - 0.983928563571*I,
-0.31969776999 + 0.983928563571*I,
0.836979627962 - 0.608101294789*I,
0.836979627962 + 0.608101294789*I]
}}}
Note the repetition of 0.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6237>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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