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COLT
2005
Springer
15 years 11 months ago
General Polynomial Time Decomposition Algorithms
We present a general decomposition algorithm that is uniformly applicable to every (suitably normalized) instance of Convex Quadratic Optimization and efficiently approaches an o...
Nikolas List, Hans-Ulrich Simon
IPL
2010
71views more  IPL 2010»
15 years 4 months ago
New common ancestor problems in trees and directed acyclic graphs
We derive a new generalization of lowest common ancestors (LCAs) in dags, called the lowest single common ancestor (LSCA). We show how to preprocess a static dag in linear time su...
Johannes Fischer, Daniel H. Huson
LATIN
2010
Springer
16 years 26 days ago
Optimal Succinctness for Range Minimum Queries
For a static array A of n totally ordered objects, a range minimum query asks for the position of the minimum between two specified array indices. We show how to preprocess A into...
Johannes Fischer
MFCS
2005
Springer
15 years 11 months ago
Inverse Monoids: Decidability and Complexity of Algebraic Questions
This paper investigates the word problem for inverse monoids generated by a set Γ subject to relations of the form e = f, where e and f are both idempotents in the free inverse m...
Markus Lohrey, Nicole Ondrusch
ESA
2003
Springer
106views Algorithms» more  ESA 2003»
15 years 11 months ago
Improved Competitive Guarantees for QoS Buffering
We consider a network providing Differentiated Services (DiffServ), which allow Internet Service Providers (ISP’s) to offer different levels of Quality of Service (QoS) to diffe...
Alexander Kesselman, Yishay Mansour, Rob van Stee