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Dec
27
comment Sum over multiple indices
@Eleven-Eleven I have edited my answer: please review.
Dec
27
revised Sum over multiple indices
Incorporated 'b' (Hypergeometric Bernoulli numbers) from edited question.
Dec
27
comment Sum over multiple indices
I have merged your follow-up question with this one; and have also incorporated changes suggested by @BobHanlon .
Dec
27
revised Sum over multiple indices
Merged 'part2' of question with this question. 'part2' to be deleted.
Dec
27
revised Sum over multiple indices
Changed ReplaceAll to localized DownValue
Dec
27
comment Sum Over Multiple Indices part 2
The $f$ in your equation above appears to take one argument. The b[m,n,M] which is supposed to replace $f$ takes three arguments. Can you clarify the relationship between b and $f$?
Dec
22
comment why head Association cannot be replaced by head List
This is really interesting... is it possible to invent your own atomic object, and make your own functions that extract/manipulate their data?
Dec
22
comment Sum over multiple indices
@Eleven-Eleven I think you should as a new question, and include your code for f, and one of our (belisarius or my) codes for generating that sum.
Dec
22
revised Sum over multiple indices
removed pointless comment from code
Dec
22
comment Sum over multiple indices
@Eleven-Eleven I don't think either of us (belisarius or I) understand what you mean. Please ask a new question (and include what modifications/additions you made to our codes)
Dec
22
comment Sum over multiple indices
@Eleven-Eleven I don't understand what you mean by "I have replaced with what I needed and It seems that my sum is always 0". Exactly what did you replace??
Dec
22
comment Sum over multiple indices
This goes faster than my answer... any ideas why?
Dec
22
comment Sum over multiple indices
@Eleven-Eleven I fixed a typo in my answer: 1/n! to 1/k!.
Dec
22
revised Sum over multiple indices
Fixed an important typo : n! --> k!
Dec
21
comment Sum over multiple indices
@belisarius is there not a $1/k!$ missing?
Dec
21
comment Sum over multiple indices
@Eleven-Eleven I finished my answer. Please check if the result is correct.
Dec
21
revised Sum over multiple indices
continuing since previous answer was unaccepted.
Dec
21
answered Sum over multiple indices
Dec
19
comment How to define a two-variable sequence?
Why not Sum[2^(n+m-2j),{j,0,m-1}] ?
Dec
18
comment Why is C-compiled (but not WVM-compiled) code so slow in Manipulate?
This solution appears to work in 9.0.1 MacOSX and in 10.0.1 on Linux.