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ICALP
2010
Springer
15 years 10 months ago
On the Inapproximability of Vertex Cover on k-Partite k-Uniform Hypergraphs
Computing a minimum vertex cover in graphs and hypergraphs is a well-studied optimizaton problem. While intractable in general, it is well known that on bipartite graphs, vertex c...
Venkatesan Guruswami, Rishi Saket
IJCGA
1998
74views more  IJCGA 1998»
15 years 5 months ago
Polyhedral Assembly Partitioning Using Maximally Covered Cells in Arrangements of Convex Polytopes
We study the following problem: Given a collection A of polyhedral parts in 3D, determine whether there exists a subset S of the parts that can be moved as a rigid body by in nite...
Leonidas J. Guibas, Dan Halperin, Hirohisa Hirukaw...
UML
2001
Springer
15 years 10 months ago
The Essence of Multilevel Metamodeling
Abstract. As the UML attempts to make the transition from a single, albeit extensible, language to a framework for a family of languages, the nature and form of the underlying meta...
Colin Atkinson, Thomas Kühne
FOCM
2007
76views more  FOCM 2007»
15 years 6 months ago
Risk Bounds for Random Regression Graphs
We consider the regression problem and describe an algorithm approximating the regression function by estimators piecewise constant on the elements of an adaptive partition. The pa...
Andrea Caponnetto, Steve Smale
ICDE
2010
IEEE
201views Database» more  ICDE 2010»
15 years 6 months ago
Vertical partitioning of relational OLTP databases using integer programming
A way to optimize performance of relational row store databases is to reduce the row widths by vertically partitioning tables into table fractions in order to minimize the number ...
Rasmus Resen Amossen