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» Triangle Fixing Algorithms for the Metric Nearness Problem
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NIPS
2004
13 years 6 months ago
Triangle Fixing Algorithms for the Metric Nearness Problem
Various problems in machine learning, databases, and statistics involve pairwise distances among a set of objects. It is often desirable for these distances to satisfy the propert...
Inderjit S. Dhillon, Suvrit Sra, Joel A. Tropp
DAM
2008
123views more  DAM 2008»
13 years 4 months ago
Ultrametrics, Banach's fixed point theorem and the Riordan group
We interpret the reciprocation process in K[[x]] as a fixed point problem related to contractive functions for certain adequate ultrametric spaces. This allows us to give a dynamic...
Ana Luzón, Manuel A. Morón
IJCGA
2008
114views more  IJCGA 2008»
13 years 4 months ago
Fixed Parameter Algorithms for the Minimum Weight Triangulation Problem
Published as Technical Report LU-CS-TR:2005-238 on February 13, 2006, ISSN 1650-1276 Report 158, Lund University, Sweden 2006 We discuss and compare four fixed parameter algorithm...
Magdalene G. Borgelt, Christian Borgelt, Christos ...
ESA
2004
Springer
103views Algorithms» more  ESA 2004»
13 years 10 months ago
Faster Fixed-Parameter Tractable Algorithms for Matching and Packing Problems
Abstract. We obtain faster algorithms for problems such as rdimensional matching, r-set packing, graph packing, and graph edge packing when the size k of the solution is considered...
Michael R. Fellows, Christian Knauer, Naomi Nishim...
WADS
2007
Springer
165views Algorithms» more  WADS 2007»
13 years 10 months ago
A Near Linear Time Approximation Scheme for Steiner Tree Among Obstacles in the Plane
We present a polynomial-time approximation scheme (PTAS) for the Steiner tree problem with polygonal obstacles in the plane with running time O(n log2 n), where n denotes the numb...
Matthias Müller-Hannemann, Siamak Tazari