Towards Tight Lower Bounds for Range Reporting on the RAM

Abstract

In the orthogonal range reporting problem, we are to preprocess a set of n points with integer coordinates on a U × U grid. The goal is to support reporting all k points inside an axis-aligned query rectangle. This is one of the most fundamental data structure problems in databases and computational geometry. Despite the importance of the problem its complexity remains unresolved in the word-RAM. On the upper bound side, three best tradeoffs exists: