Pairwise summation
= Pairwise summation
{wiki=Pairwise_summation}
Pairwise summation is a technique used to efficiently compute the sum of a large number of items, especially in the context of parallel processing and high-performance computing. The basic idea is to break down the summation into smaller parts that can be computed independently and then combine the results. Here's how it typically works: 1. **Divide the Input**: The data is divided into pairs.