Random Random Walks on Zd 2
Random Random Walks on Zd 2
复制标题
Zd 2 上的随机随机游走
DOI:
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发表时间:
1997
期刊:
影响因子:
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通讯作者:
David Bruce Wilsondbwilson
中科院分区:
文献类型:
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作者:
David Bruce Wilsondbwilson
We consider random walks on classes of graphs de®ned on the ddimensional binary cube Zd2 by placing edges on n randomly chosen parallel classes of vectors. The mixing time of a graph is the number of steps of a random walk before the walk forgets where it started, and reaches a random location. In this paper we resolve a question of Diaconis by ®nding exact expressions for this mixing time that hold for all n > d and almost all choices of vector classes. This result improves a number of previous bounds. Our method, which has application to similar problems on other Abelian groups, uses the concept of a universal hash function, from computer science.