#11941: Solve and assumptions too aggressive with cube root of negative numbers
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Reporter: kcrisman | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone: sage-4.8
Component: symbolics | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by mboratko):
It seems that sage sets domain: complex (I was made aware of this by
burcin in IRC). You do get this result as follows:
{{{(%i8) domain:complex;
(%o8) complex
(%i9) solve(x^3+1=0,x);
(%o9) [x = ((-1)^(1/3)*sqrt(3)*%i-(-1)^(1/3))/2,
x = -((-1)^(1/3)*sqrt(3)*%i+(-1)^(1/3))/2,x = (-1)^(1/3)]
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11941#comment:6>
Sage <http://www.sagemath.org>
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