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» The Complexity of Futile Questioning
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COCO
2006
Springer
113views Algorithms» more  COCO 2006»
14 years 1 months ago
On the Complexity of Numerical Analysis
We study two quite different approaches to understanding the complexity of fundamental problems in numerical analysis. We show that both hinge on the question of understanding the...
Eric Allender, Peter Bürgisser, Johan Kjeldga...
CC
2006
Springer
133views System Software» more  CC 2006»
13 years 9 months ago
The complexity of chromatic strength and chromatic edge strength
The sum of a coloring is the sum of the colors assigned to the vertices (assuming that the colors are positive integers). The sum (G) of graph G is the smallest sum that can be ach...
Dániel Marx
APPROX
2009
Springer
149views Algorithms» more  APPROX 2009»
14 years 4 months ago
On the Complexity of the Asymmetric VPN Problem
We give the first constant factor approximation algorithm for the asymmetric Virtual Private Network (Vpn) problem with arbitrary concave costs. We even show the stronger result, ...
Thomas Rothvoß, Laura Sanità
SUTC
2006
IEEE
14 years 3 months ago
The Computational Complexity of Enforceability Validation for Generic Access Control Rules
In computer security, many researches have tackled on the possibility of a unified model of access control, which could enforce any access control policies within a single unified...
Vincent C. Hu, D. Richard Kuhn, David F. Ferraiolo
ICTCS
2005
Springer
14 years 3 months ago
Weighted Coloring: Further Complexity and Approximability Results
Given a vertex-weighted graph G = (V, E; w), w(v) ≥ 0 for any v ∈ V , we consider a weighted version of the coloring problem which consists in finding a partition S = (S1, . ...
Bruno Escoffier, Jérôme Monnot, Vange...