#6441: [with patch, needs work] Charpoly (plus adjoint and det)
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Reporter: spancratz | Owner: somebody
Type: defect | Status: new
Priority: major | Milestone: sage-4.1.2
Component: linear algebra | Keywords: charpoly,
division-free
Reviewer: Rob Beezer, Yann Laigle-Chapuy | Author: Sebastian Pancratz
Merged: |
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Comment(by spancratz):
Dear Rob,
Yes, you're right. I hadn't even heard about the "-long" tests.
Regarding the above problems, I take it I only need to look at the first
few problems and not the known failures, right?
I've already checked that they definitely are "just" numerical noise,
running the methods in question with the parameter "prec" in {10,20,30}
gave answers 0.95, 1.0001, 0.99999994, respectively. However, I think the
right way to fix this is not to change the doctests, but to pass the
parameter algorithm="hessenberg" at the appropriate place to ensure that
the behaviour isn't changed. I'll look into this probably tomorrow.
Sebastian
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6441#comment:38>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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