Sciweavers

DCG
2010
107views more  DCG 2010»
13 years 7 months ago
An Optimization Problem Related to Minkowski's Successive Minima
Abstract The purpose of this paper is to establish an inequality connecting the lattice point enumerator of a 0-symmetric convex body with its successive minima. To this end, we in...
Romanos Malikiosis
DCG
2010
104views more  DCG 2010»
13 years 9 months ago
Vietoris-Rips Complexes of Planar Point Sets
Fix a finite set of points in Euclidean n-space En , thought of as a point-cloud sampling of a certain domain D En . The VietorisRips complex is a combinatorial simplicial complex...
Erin W. Chambers, Vin de Silva, Jeff Erickson, Rob...
DCG
2010
146views more  DCG 2010»
13 years 9 months ago
An Elementary Deduction of the Topological Radon Theorem from Borsuk-Ulam
Abstract. The Topological Radon Theorem states that, for every continuous function from the boundary of a (d + 1)-dimensional simplex into Rn , there exist a pair of disjoint faces...
Craig R. Guilbault
DCG
2010
121views more  DCG 2010»
13 years 9 months ago
Compression Schemes, Stable Definable Families, and o-Minimal Structures
We show that any family of sets uniformly definable in an ominimal structure has an extended compression scheme of size equal to the number of parameters in the defining formula. ...
H. R. Johnson, M. C. Laskowski
DCG
2010
97views more  DCG 2010»
13 years 11 months ago
Cech Type Approach to Computing Homology of Maps
A new approach to algorithmic computation of the homology of spaces and maps is presented. The key point of the approach is a change in the representation of sets. The proposed rep...
Marian Mrozek
DCG
2010
101views more  DCG 2010»
13 years 11 months ago
Unknot Diagrams Requiring a Quadratic Number of Reidemeister Moves to Untangle
Given any knot diagram E, we present a sequence of knot diagrams of the same knot type, for which the minimum number of Reidemeister moves required to pass to E is quadratic with ...
Joel Hass, Tahl Nowik
DCG
2010
67views more  DCG 2010»
14 years 16 days ago
Valedictory Editorial
Jacob E. Goodman, Ricky Pollack
DCG
2010
289views more  DCG 2010»
14 years 16 days ago
Algorithms for Approximate Shortest Path Queries on Weighted Polyhedral Surfaces
We consider the well known geometric problem of determining shortest paths between pairs of points on a polyhedral surface P, where P consists of triangular faces with positive we...
Lyudmil Aleksandrov, Hristo Djidjev, Hua Guo, Anil...
DCG
2010
78views more  DCG 2010»
14 years 16 days ago
An Eberhard-Like Theorem for Pentagons and Heptagons
Matt DeVos, Agelos Georgakopoulos, Bojan Mohar, Ro...
DCG
2010
91views more  DCG 2010»
14 years 16 days ago
The Contact Polytope of the Leech Lattice
The contact polytope of a lattice is the convex hull of its shortest vectors. In this paper we reveal the face structure of the contact polytope of the Leech lattice. We classify i...
Mathieu Dutour Sikiric, Achill Schürmann, Fra...