#15497: sum(lcm(10, i), i, 1, 10) gives incorrect answer
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Reporter: ppurka | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.1
Component: calculus | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps: todo
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Comment (by kcrisman):
Here is the problem, presumably (`lcm` not being symbolic in this way):
{{{
sage: lcm(10,x)
10*x
}}}
We can all be Gauss with this.
{{{
sage: sum(lcm(1,x),x,1,100)
5050
}}}
The solution is to make sure that `lcm(a,b)` does something symbolic, or
throws an error, when we feed it symbolic entries. Is there already a
ticket for this, perhaps?
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Ticket URL: <http://trac.sagemath.org/ticket/15497#comment:2>
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