Finding Biconnected Components and Computing Tree Functions in Logarithmic Parallel Time (Extended Summary)

Finding Biconnected Components and Computing Tree Functions in Logarithmic Parallel Time (Extended Summary)
复制标题

在对数并行时间内查找双连通分量并计算树函数(扩展摘要)

DOI:
--
复制
发表时间:
1984
期刊:
IEEE Annual Symposium on Foundations of Computer Science
影响因子:
--
通讯作者:
U. Vishkin
U. Vishkin
中科院分区:
--
文献类型:
--
作者:
R. Tarjan;U. Vishkin

文献摘要

被引文献

相似文献

本文提出了一种新的无向图块(双连通分支)的求法。串行实现在0[n+m]时间和空间中在n个顶点和m条边的图上运行。在一个并行读、并行写的RAM上,使用0[n +m]个处理器,在0[log n]时间和0[n +m]空间内并行实现。另一种实现在0[n/sup 2/p]时间和0[n/sup 2/]空间中运行,使用任意数量的p n/sup 2/log/sup 2/-n个处理器,在并发读,排他写的并行RAM上。后一种算法具有最佳的加速比,假设输入的邻接矩阵表示。本文介绍了一种通用的算法技术,它简化和改进了树上各种函数的计算。这种技术通常需要0(log n)时间,使用排他读排他写并行RAM上的0(n)空间。
We propose a new algorithm for finding the blocks (biconnected components) of an undirected graph. A serial implementation runs in 0[n+m] time and space on a graph of n vertices and m edges. A parallel implmentation runs in 0[log n] time and 0[n+m] space using 0[n+m] processors on a concurrent-read, concurrent-write parallel RAM. An alternative implementation runs in 0[n/sup 2/p] time and 0[n/sup 2/] space using any number p ⩽ n/sup 2/log/sup 2/-n of processors, on a concurrent-read, exclusive-write parallel RAM. The latter algorithm has optimal speedup, assuming an adjacency matrix representation of the input. A general algorithmic technique which simplifies and improve computation of various functions on tress is introduced. This technique typically requires 0(log n) time using 0(n) space on an exclusive-read exclusive-write parallel RAM.