@techreport{oai:ipsj.ixsq.nii.ac.jp:00032535, author = {陳, 慰 and 中野, 浩嗣 and 増澤, 利光 and 都倉, 信樹 and Wei, Chen and Koji, Nakano and Toshimitsu, Masuzawa and Nobuki, Tokura}, issue = {58(1992-AL-028)}, month = {Jul}, note = {ソートされた平面点集合が与えられたとき,その点集合の凸包をPRAM CREWの上,O()時間,n/log nプロセッサで求める最適並列アルゴリズムが既に知られている.本研究で提案する並列アルゴリズムは,その点集合の全ての接頭部の凸包をCREW PRAMの上,O(g )時間,n/log nプロセッサで求める.このアルゴリズムは最適である., The optimal parallel algorithm for computing the convex hull of a sorted set S of n points in the plane is known to be executed in O(log n) time using n/log n processors on the CREW PRAM. In this paper we present a parallel algorithm for computing the convex hulls of all prefix sets of S. The algorithm runs in O(log n) time using n/log n processors on the CREW PRAM, and hence is asymptotically optimal.}, title = {ソートされた点集合の接頭部凸包を求める最適並列アルゴリズム}, year = {1992} }