#7202: On OS X 10.4 ppc, to_poly_solve evidently doesn't exist / work, which
breaks some symbolic doctests
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Reporter: was | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone: sage-4.2.1
Component: calculus | Keywords:
Work_issues: | Author:
Reviewer: | Merged:
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Comment(by kcrisman):
Can you test this again on 4.2? Reasons follow.
This works fine on my OSX 10.4 G4 PPC with 4.1.2.rc2 with #6642 also
loaded. Namely:
{{{
sage: var('Q')Q
sage: solve(Q*sqrt(Q^2+2)-1,Q)[Q == 1/sqrt(Q^2 + 2)]
sage: solve(Q*sqrt(Q^2+2)-1,Q,to_poly_solve=True)
[Q == -1/sqrt(-sqrt(2) + 1), Q == 1/sqrt(-sqrt(2) + 1), Q ==
-1/sqrt(sqrt(2) + 1), Q == 1/sqrt(sqrt(2) + 1)]
sage: K.<a> = NumberField(x^5-x+1, embedding=-1)
sage: SR(a)
-1.1673040153
}}}
Note that the behavior has changed since #6642, because using
to_poly_solve as a default meant that we didn't always get multiplicities,
so now it is an option. Also note that in the ONE case above, out of
many many new correct solutions, we get two spurious ones - this is fixed
in Maxima CVS, though, so when the new one comes out in December
(probably) we can upgrade and fix that.
Anyway, I think it is much more likely that this build which was tested
for some reason had something patched which asked for to_poly_solve to be
used but didn't have to_poly_solver loaded by Maxima, as this is precisely
the error message which would come out of that. However, #6642 has both
in Sage since 4.2.alpha0, so I don't think this should be a problem any
more.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7202#comment:3>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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