• 全部
  • 问答

请教算法导论(二版)有关极大流(26章)的问题,即习题26.4-7

wycl16514 2008-04-11 01:17:08
26.4-7
Let δf (u, v) be the distance (number of edges) from u to v in the residual network Gf. Show that GENERIC-PUSH-RELABEL maintains the properties that h[u] < |V| implies h[u] ≤ δf(u, t) and that h[u] ≥ |V| implies h[u] -|V| ≤ δf(u, s).
搞不清楚,跪求各位帮助解答,不胜感激!!
...全文
140 点赞 收藏 2
写回复
2 条回复
切换为时间正序
当前发帖距今超过3年,不再开放新的回复
发表回复
longdouhzt 2011-08-14
设 u 到 t 的最短路径为 v0 v1 .... vk
v0 = u, vk = t
则 δf(u, t) = k

利用h的定义 h[v0] <= h[v1] + 1 <= .. <= h[vk] + k = h[t] + k = k = δf(u, t)
后面那个一样证法
回复
wycl16514 2008-04-11
不好意思,题目有错,再写一遍
Let δf (u, v) be the distance (number of edges) from u to v in the residual network Gf. Show that GENERIC-PUSH-RELABEL maintains the properties that h[u] < |V| implies h[u] ≤ δf(u, t) and that h[u] ≥ |V| implies h[u] -|V| ≤ δf(u, s).
回复
相关推荐
发帖
数据结构与算法
创建于2007-08-27

3.2w+

社区成员

数据结构与算法相关内容讨论专区
申请成为版主
帖子事件
创建了帖子
2008-04-11 01:17
社区公告
暂无公告