 The Kogge–Stone adder concept was developed by Peter M. Kogge and Harold S. Stone, who published it in a seminal 1973 paper titled "A Parallel Algorithm for the Efficient Solution of a General Class of Recurrence Equations".Enhancements to the original implementation include increasing the radix and sparsity of the adder.The "radix" of the adder refers to how many results from the previous level of computation are used to generate the next one.