منابع مشابه
Finding Four Independent Trees
Motivated by a multi-tree approach to the design of reliable communication protocols, Itai and Rodeh gave a linear time algorithm for finding two independent spanning trees in a 2-connected graph. Cheriyan and Maheshwari gave an O(|V |) algorithm for finding three independent spanning trees in a 3-connected graph. In this paper we present an O(|V |) algorithm for finding four independent spanni...
متن کاملFinding Level-Ancestors in Trees
The level-ancestor problem is considered. Suppose a rooted tree T is given for preprocessing. Answer quickly queries of the following form. Given a vertex v and an integer i > 0, find the ith vertex on the path from v to the root. Given any m, 1 ~<m~<log* n, we achieve the following results: (1) O(log (m) n) a time using an optimal number of processors for preprocessing and constant time using ...
متن کاملFinding Trusted Publish/Subscribe Trees
Publish/Subscribe systems assume that clients and brokers abide by the matching and forwarding protocols. Such an assumption implies implicit trust between all components of the system and has led to security issues being largely ignored. As publish/subscribe is increasingly used in applications where implicit trust can not be assumed, an approach is required to mitigate misbehaviour. We propos...
متن کاملFinding NECTARs from Evolutionary Trees
Mining trees is very useful in domains like bioinformatics, web mining, mining semi-structured data, and so on. These efforts largely assumed that the trees are static. However, in many real applications, tree data are evolutionary in nature. In this paper, we focus on mining evolution patterns from historical tree-structured data. Specifically, we propose a novel approach to discover negativel...
متن کاملFinding Minimum Congestion Spanning Trees
Given a graph G and a positive integer k, we want to nd k spanning trees on G, not necessarily disjoint, of minimum total weight, such that the weight of each edge is subject to a penalty function if it belongs to more than one tree. We present a polynomial time algorithm for this problem; the algorithm's complexity is quadratic in k. We also present two heuristics with complexity linear in k. ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Discrete Applied Mathematics
سال: 2009
ISSN: 0166-218X
DOI: 10.1016/j.dam.2009.02.009