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» On a Cone Covering Problem
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DAM
2011
15 years 1 months ago
Optimization problems in multiple subtree graphs
We study various optimization problems in t-subtree graphs, the intersection graphs of tsubtrees, where a t-subtree is the union of t disjoint subtrees of some tree. This graph cl...
Danny Hermelin, Dror Rawitz
COMBINATORICS
2007
86views more  COMBINATORICS 2007»
15 years 6 months ago
Lower Bounds for the Football Pool Problem for 7 and 8 Matches
Let k3(n) denote the minimal cardinality of a ternary code of length n and covering radius one. In this paper we show k3(7) ≥ 156 and k3(8) ≥ 402 improving on the best previou...
Wolfgang Haas
STOC
2010
ACM
211views Algorithms» more  STOC 2010»
16 years 3 months ago
Maintaining a Large Matching or a Small Vertex Cover
We consider the problem of maintaining a large matching or a small vertex cover in a dynamically changing graph. Each update to the graph is either an edge deletion or an edge ins...
Krzysztof Onak and Ronitt Rubinfeld
JWSR
2007
89views more  JWSR 2007»
15 years 6 months ago
Fully Automated Web Services Discovery and Composition Through Concept Covering and Concept Abduction
: We propose a framework and polynomial algorithms for semantic-based automated Web service composition, fully compliant with Semantic Web technologies. The approach exploits the r...
Azzurra Ragone, Tommaso Di Noia, Eugenio Di Sciasc...
SWAT
2010
Springer
204views Algorithms» more  SWAT 2010»
15 years 4 months ago
Feasible and Accurate Algorithms for Covering Semidefinite Programs
In this paper we describe an algorithm to approximately solve a class of semidefinite programs called covering semidefinite programs. This class includes many semidefinite programs...
Garud Iyengar, David J. Phillips, Clifford Stein