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» On exact bicoverings of 12 points
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FQ
2003
Springer
13 years 11 months ago
Symplectic Spreads and Permutation Polynomials
Every symplectic spread of PG(3, q), or equivalently every ovoid of Q(4, q), is shown to give a certain family of permutation polynomials of GF(q) and conversely. This leads to an...
Simeon Ball, Michael Zieve
KI
2002
Springer
13 years 5 months ago
Qualitative Velocity and Ball Interception
In many approaches for qualitative spatial reasoning, navigation of an agent in a more or less static environment is considered (e.g. in the double-cross calculus [12]). However, i...
Frieder Stolzenburg, Oliver Obst, Jan Murray
ICCS
2003
Springer
13 years 11 months ago
Anisotropic Convection Model for the Earth's Mantle
The paper presents a theory for modeling flow in anisotropic, viscous rock. This theory has originally been developed for the simulation of large deformation processes including t...
Hans-B. Mühlhaus, M. Cada, Louis Moresi
IR
2000
13 years 5 months ago
Adding Compression to Block Addressing Inverted Indexes
Inverted index compression, block addressing and sequential search on compressed text are three techniques that have been separately developed for e cient, low-overhead text retrie...
Gonzalo Navarro, Edleno Silva de Moura, Marden S. ...
COMPGEOM
2005
ACM
13 years 7 months ago
Abstract order type extension and new results on the rectilinear crossing number
Order Type Extension and New Results ectilinear Crossing Number - Extended Abstract Oswin Aichholzer∗ Hannes Krasser† We provide a complete data base of all realizable order t...
Oswin Aichholzer, Hannes Krasser