Paper Info
Title
A Randomized Competitive Algorithm for Evaluating Priced AND/OR Trees
Abstract
Recently, Charikar et. al. investigated the problem of evaluating AND/OR trees, with non uniform costs on its leaves, under the perspective of the competitive analysis. For an AND-OR tree T they presented a μ(T)-competitive deterministic polynomial time algorithm, where μ(T) is the number of leaves that must be read, in the worst case, in order to determine the value of T. Furthermore, they prove that μ(T) is a lower bound on the deterministic competitiveness, which assures the optimality of their algorithm. The power of randomization in this context has remained as an open question. Here, we give a step towards solving this problem by presenting a 0.792 μ(T)-competitive randomized polynomial time algorithm. This contrasts with the best known lower bound μ(T)/2.
Year
DOI
Venue
2008
10.1007/978-3-540-24749-4_44
Theor. Comput. Sci.
Keywords
DocType
Volume
competitive analysis,lower bound
Journal
401
Issue
ISSN
Citations 
1-3
0302-9743
3
PageRank 
References 
Authors
0.44
11
1
Name
Order
Citations
PageRank
Eduardo Sany Laber122927.12