#10682: sum fails with lower bound != 0 or 1 (upgrade maxima to 5.26)
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Reporter: fmaltey
| Owner: burcin
Type: defect
| Status: needs_work
Priority: critical
| Milestone: sage-5.0
Component: symbolics
| Keywords:
Work_issues: several doctests need to be patched due to changes in output
format/term order | Upstream: N/A
Reviewer:
| Author:
Merged:
| Dependencies:
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Comment(by dimpase):
Replying to [comment:12 dimpase]:
> The first test failure, in {{{devel/sage/sage/matrix/matrix2.pyx}}},
actually shows that 5.26 has improved in quality of such computations. The
error between the exact and .n() answers has decreased by several orders
of magnitude.
Here is the evidence ({{{a}}} is the matrix from the
{{{matrix/matrix2.pyx}}}, line 10369, test, {{{b}}} is the exact matrix).
The following is with the new spkg:
{{{
sage: b=matrix([[1,pi],[100,1/100]])
sage: a=matrix(RR,[[1.,pi.n()],[100.,.01]])
sage: (a.exp()-b.exp()).norm()
9.32525865157e-07
}}}
The same computation on Sage 4.8 gives {{{(a.exp()-b.exp()).norm()}}}
equal to {{{0.373383533611}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10682#comment:13>
Sage <http://www.sagemath.org>
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