Publications [#236909] of John H. Reif

Journal articles or Book chapters PUBLISHED

1. Reif, JH; Sen, S, OPTIMAL RANDOMIZED PARALLEL ALGORITHMS FOR COMPUTATIONAL GEOMETRY., Proceedings of the International Conference on Parallel Processing (December, 1987), pp. 270-277
   (last updated on 2026/01/14)

   Abstract:
   The authors present parallel algorithms for some fundamental problems in computational geometry which have optimal running time with very high probability (approaching 1 as n yields infinity ). These include planar point location, triangulation, trapezoidal decomposition, 3-D maxima, two-set dominance counting, and range-counting, among others. Most of these algorithms run on the CREW PRAM model with O(n) processors and execute in O(log n) time. Most of these algorithms use a novel data structure called the nested plane sweep tree. Random splitting is used very effectively to divide and conquer on the plane, raising the possibility of extending this technique to higher dimensions.