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EJC
2008
15 years 6 months ago
Generalised dualities and maximal finite antichains in the homomorphism order of relational structures
The motivation for this paper is three-fold. First, we study the connectivity properties of the homomorphism order of directed graphs, and more generally for relational structures...
Jan Foniok, Jaroslav Nesetril, Claude Tardif
CG
2007
Springer
15 years 6 months ago
Temporal wavelet-based compression for 3D animated models
We present an efficient compression scheme for animated sequences of triangular meshes of the same connectivity. The proposed algorithm exploits the temporal coherence of the geo...
Frédéric Payan, Marc Antonini
COMGEO
2007
ACM
15 years 6 months ago
Geometric dilation of closed planar curves: New lower bounds
Given two points on a closed planar curve, C, we can divide the length of a shortest connecting path in C by their Euclidean distance. The supremum of these ratios, taken over all...
Annette Ebbers-Baumann, Ansgar Grüne, Rolf Kl...
CORR
2007
Springer
95views Education» more  CORR 2007»
15 years 6 months ago
Support-Graph Preconditioners for 2-Dimensional Trusses
We use support theory, in particular the fretsaw extensions of Shklarski and Toledo [ST06a], to design preconditioners for the stiffness matrices of 2-dimensional truss structure...
Samuel I. Daitch, Daniel A. Spielman
CORR
2007
Springer
108views Education» more  CORR 2007»
15 years 6 months ago
Scuba Search : when selection meets innovation
— We proposed a new search heuristic using the scuba diving metaphor. This approach is based on the concept of evolvability and tends to exploit neutrality in fitness landscape....
Sébastien Vérel, Philippe Collard, M...