135 search results - page 2 / 27 » Hardness of cut problems in directed graphs |
FOCS
2008
IEEE
13 years 11 months ago
2008
IEEE
We prove that approximating the Max Acyclic Subgraph problem within a factor better than 1/2 is Unique-Games hard. Specifically, for every constant ε > 0 the following holds:...
STOC
2006
ACM
13 years 11 months ago
2006
ACM
We show that for any constant ε > 0, there is no Ω(log1−ε M)approximation algorithm for the directed congestion minimization problem on networks of size M unless NP ⊆ Z...
CORR
2008
Springer
13 years 5 months ago
2008
Springer
For an edge-weighted connected undirected graph, the minimum k-way cut problem is to find a subset of edges of minimum total weight whose removal separates the graph into k connect...
ESA
2009
Springer
13 years 12 months ago
2009
Springer
Finding sparse cuts is an important tool for analyzing large graphs that arise in practice, such as the web graph, online social communities, and VLSI circuits. When dealing with s...
STOC
2007
ACM
14 years 5 months ago
2007
ACM
Given as input a directed graph on N vertices and a set of source-destination pairs, we study the problem of routing the maximum possible number of source-destination pairs on pat...