Reciprocal sum of elements.
|args||List of numbers, vectors, and/or matrices.|
|return value||The recursive, but independent reciprocal sum of the arguments.|
It first calculates the reciprocal of the elements, then adds them up.
The argument can be a list of numbers, a vector, or a matrix. If there is a list of matrices or vectors, the reciprocal is calculated separately for each of them, and the reciprocal sum of results will be returned.