[Axiom-developer] [#180 bug #9216 differentiating sums with respect to a bound is wrong]

[kratt6]

Changes 
http://page.axiom-developer.org/zope/mathaction/180Bug9216DifferentiatingSumsWithRespectToABoundIsWrong/diff
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??changed:
-  The function $n\mapsto\sum_{k=1}^n f(k,n)$ is well defined only for integral 
values of $n$ greater than or equal to zero. There is not even consensus how to 
define this function for $n<0$. Thus, it is not differentiable. The fix I 
propose is thus
  The function $$n\mapsto\sum_{k=1}^n f(k,n)$$ is well defined only for 
integral values of $n$ greater than or equal to zero. There is not even 
consensus how to define this function for $n<0$. Thus, it is not 
differentiable. The fix I propose is thus

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forwarded from http://page.axiom-developer.org/zope/mathaction/address@hidden