Bugs item #2099542, was opened at 20080907 22:07
Message generated for change (Comment added) made by robert_dodier
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Category: Lisp Core  Simplification
Group: None
>Status: Closed
>Resolution: Works For Me
Priority: 5
Private: No
Submitted By: Jack O'Connor (oconnor663)
Assigned to: Nobody/Anonymous (nobody)
Summary: Common sum simplification unsuccessful
Initial Comment:
The following sum fails to simplify:
sum( n / 2^n, n, 1, inf), simpsum;
Presumably the answer should be 2, but instead Maxima just returns the sum in sigma notation.

>Comment By: Robert Dodier (robert_dodier)
Date: 20080908 22:37
Message:
simplify_sum applies simpsum and some more powerful methods (Gosper and
Zeilberger and some others if I remember correctly). Anyway simplify_sum
does know how to do this problem.
load (simplify_sum);
simplify_sum (sum( n / 2^n, n, 1, inf));
=> 2
Closing this report.

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