Title
The structure and number of global roundings of a graph
Abstract
Given a connected weighted graph G = (V,E), we consider a hypergraph HG = (V, PG) corresponding to the set of all shortest paths in G. For a given real assignment a on V satisfying 0≤a(v)≤1, a global rounding α with respect to HG is a binary assignment satisfying that |Σv∈Fa(v)-α(v)| F ∈ PG. We conjecture that there are at most |V| + 1 global roundings for HG, and also the set of global roundings is an affine independent set. We give several positive evidences for the conjecture.
Year
DOI
Venue
2004
10.1016/j.tcs.2004.02.044
Theoretical Computer Science - Special papers from: COCOON 2003
Keywords
DocType
Volume
05c65,shortest path,combinatorics,rounding,hypergraph hg,05c90,68q25,hypergraph,positive evidence,68q20,global rounding,affine independent set,graph,global roundings,real assignment,discrepancy,binary assignment,connected weighted graph,satisfiability,independent set
Journal
325
Issue
ISSN
ISBN
3
0304-3975
3-540-40534-8
Citations 
PageRank 
References 
5
0.64
8
Authors
4
Name
Order
Citations
PageRank
Tetsuo Asano11448229.35
naoki katoh21101187.43
Hisao Tamaki31098105.17
Takeshi Tokuyama41179417.31