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» On the Complexity of Hardness Amplification
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STOC
2007
ACM
134views Algorithms» more  STOC 2007»
14 years 8 months ago
Hardness of routing with congestion in directed graphs
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...
Julia Chuzhoy, Venkatesan Guruswami, Sanjeev Khann...
TCS
2011
13 years 2 months ago
Complexity of the traveling tournament problem
Abstract. We consider the complexity of the traveling tournament problem, which is a well-known benchmark problem in tournament timetabling. The problem was supposed to be computat...
Clemens Thielen, Stephan Westphal
ESA
2003
Springer
189views Algorithms» more  ESA 2003»
14 years 27 days ago
On the Complexity of Approximating TSP with Neighborhoods and Related Problems
We prove that various geometric covering problems, related to the Travelling Salesman Problem cannot be efficiently approximated to within any constant factor unless P = NP. This ...
Shmuel Safra, Oded Schwartz
ISAAC
1993
Springer
149views Algorithms» more  ISAAC 1993»
13 years 11 months ago
The Complexity of the Optimal Variable Ordering Problems of Shared Binary Decision Diagrams
A binary decision diagram (BDD) is a directed acyclic graph for representing a Boolean function. BDD’s are widely used in various areas which require Boolean function manipulatio...
Seiichiro Tani, Kiyoharu Hamaguchi, Shuzo Yajima
CORR
2002
Springer
125views Education» more  CORR 2002»
13 years 7 months ago
Complexity of Manipulating Elections with Few Candidates
In multiagent settings where the agents have different preferences, preference aggregation is a central issue. Voting is a general method for preference aggregation, but seminal r...
Vincent Conitzer, Tuomas Sandholm