The minimum vertex degree of a graph on uniform points in [0,1](d)

被引:31
作者
Appel, MJB [1 ]
Russo, RP [1 ]
机构
[1] UNIV IOWA,DEPT STAT & ACTUARIAL SCI,IOWA CITY,IA 52242
关键词
random graph; minimum vertex degree; largest nearest-neighbor link;
D O I
10.2307/1428077
中图分类号
O21 [概率论与数理统计]; C8 [统计学];
学科分类号
020208 ; 070103 ; 0714 ;
摘要
This article continues an investigation begun in [2]. A random graph G(n)(x) is constructed on independent random points U-1, ..., U-n distributed uniformly on [0, 1](d), d greater than or equal to 1, in which two distinct such points are joined by an edge if the l(infinity)-distance between them is at most some prescribed value 0 < x < 1. Almost-sure asymptotic results are obtained for the convergence/divergence of the minimum vertex degree of the random graph, as the number n of points becomes large and the edge distance: x is allowed to vary with n. The largest nearest neighbor link d(n), the smallest x such that G(n)(x) has no vertices of degree zero, is shown to satisfy lim(n-->infinity) (d(n)(d) n/log n) = 1/2d, d greater than or equal to 1, a.s. Series and sequence criteria on edge distances {x(n)} are provided which guarantee the random graph to be complete, a.s. These criteria imply a.s. limiting behavior of the diameter of the vertex set.
引用
收藏
页码:582 / 594
页数:13
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