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» Computing crossing numbers in quadratic time
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ICPR
2008
IEEE
14 years 9 months ago
Force histograms computed in O(NlogN)
The relative position between two objects in a 2D raster image is often represented quantitatively by a force histogram. In the general case, force histograms are computed in O(KN...
JingBo Ni, Pascal Matsakis
FOCS
1998
IEEE
14 years 25 days ago
Unsatisfiable Systems of Equations, Over a Finite Field
The properties of any system of k simultaneous equations in n variables over GF(q), are studied, with a particular emphasis on unsatisfiable systems. A general formula for the num...
Alan R. Woods
COMPGEOM
2000
ACM
14 years 29 days ago
When crossings count - approximating the minimum spanning tree
We present an (1+ε)-approximation algorithm for computing the minimum-spanning tree of points in a planar arrangement of lines, where the metric is the number of crossings betwee...
Sariel Har-Peled, Piotr Indyk
ESA
2005
Springer
131views Algorithms» more  ESA 2005»
14 years 2 months ago
Computing Common Intervals of K Permutations, with Applications to Modular Decomposition of Graphs
We introduce a new way to compute common intervals of K permutations based on a very simple and general notion of generators of common intervals. This formalism leads to simple an...
Anne Bergeron, Cedric Chauve, Fabien de Montgolfie...
MOC
1998
88views more  MOC 1998»
13 years 8 months ago
A space efficient algorithm for group structure computation
We present a new algorithm for computing the structure of a finite abelian group, which has to store only a fixed, small number of group elements, independent of the group order....
Edlyn Teske