sum -- compute the sum

Description

sum provides the sum of the members of a list, set, or chain complex, optionally with a function applied to each one.

sum(ChainComplex) -- direct sum of the components of a chain complex
sum(ChainComplexMap) -- direct sum of the components of a chain map
sum(List) -- sum the elements of a list
sum(Set) -- sum of elements
sum(Tally) -- sum of elements
sum(VisibleList,Function) -- sum results of applying a function
sum(VisibleList,VisibleList,Function) -- sum results of applying a function pairwise
sum(ZZ,Function) -- sum consecutive values of a function