#4942: find_root() is broken when interval borders cannot be evaluated
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Reporter: mabshoff | Owner: jkantor
Type: defect | Status: new
Priority: blocker | Milestone: sage-3.3
Component: numerical | Keywords:
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Reported in http://groups.google.com/group/sage-
support/browse_thread/thread/40da8039090c3e8a
{{{
Hi, I'm trying out SAGE for the first time, so I entered what you
suggested (see above).
Now, from the plot, it there seems to be no other roots between 0 and 2
so I entered
sage: find_root(x^2*log(x,2)-1,0, 2)
and got the root = 0.0
what am I missing here?
TIA,
AJG
}}}
But note the following:
{{{
sage: find_root(1/(x-1)+1,0, 2)
0.0
sage: find_root(1/(x-1)+1,0.00001, 2)
1.0000000000011564
}}}
Cheers,
Michael
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4942>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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