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LMCS
2007
132views more  LMCS 2007»
15 years 9 days ago
The Complexity of Model Checking Higher-Order Fixpoint Logic
Higher-Order Fixpoint Logic (HFL) is a hybrid of the simply typed λ-calculus and the modal µ-calculus. This makes it a highly expressive temporal logic that is capable of express...
Roland Axelsson, Martin Lange, Rafal Somla
COCO
2006
Springer
89views Algorithms» more  COCO 2006»
15 years 4 months ago
Hardness of the Covering Radius Problem on Lattices
We provide the first hardness result for the Covering Radius Problem on lattices (CRP). Namely, we show that for any large enough p there exists a constant cp > 1 such that C...
Ishay Haviv, Oded Regev
90
Voted
CORR
2004
Springer
104views Education» more  CORR 2004»
15 years 9 days ago
Inapproximability of Combinatorial Optimization Problems
We survey results on the hardness of approximating combinatorial optimization problems. Contents
Luca Trevisan
92
Voted
STOC
2005
ACM
135views Algorithms» more  STOC 2005»
16 years 23 days ago
Hardness of the undirected congestion minimization problem
We show that there is no log log M log log log M -approximation for the undirected congestion minimization problem unless NP ZPTIME(npolylog n ), where M is the size of the grap...
Matthew Andrews, Lisa Zhang
IWPEC
2009
Springer
15 years 7 months ago
The Parameterized Complexity of Some Geometric Problems in Unbounded Dimension
We study the parameterized complexity of the following fundamental geometric problems with respect to the dimension d: i) Given n points in Rd, compute their minimum enclosing cyl...
Panos Giannopoulos, Christian Knauer, Günter ...