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COMBINATORICS
2000
89views more  COMBINATORICS 2000»
14 years 9 months ago
Large Dihedral Symmetry of the Set of Alternating Sign Matrices
We prove a conjecture of Cohn and Propp, which refines a conjecture of Bosley and Fidkowski about the symmetry of the set of alternating sign matrices (ASMs). We examine data aris...
Benjamin Wieland
ICIP
2007
IEEE
15 years 4 months ago
Structural Texture Segmentation using Affine Symmetry
Many natural textures comprise structural patterns and show strong self-similarity. We use affine symmetry to segment an image into self-similar regions; that is a patch of textu...
Heechan Park, Graham R. Martin, Abhir Bhalerao
RSS
2007
134views Robotics» more  RSS 2007»
14 years 11 months ago
A Discrete Geometric Optimal Control Framework for Systems with Symmetries
— This paper studies the optimal motion control of mechanical systems through a discrete geometric approach. At the core of our formulation is a discrete Lagrange-d’AlembertPon...
Marin Kobilarov, Mathieu Desbrun, Jerrold E. Marsd...
SAT
2009
Springer
117views Hardware» more  SAT 2009»
15 years 4 months ago
Dynamic Symmetry Breaking by Simulating Zykov Contraction
Abstract. We present a new method to break symmetry in graph coloring problems. While most alternative techniques add symmetry breaking predicates in a pre-processing step, we deve...
Bas Schaafsma, Marijn Heule, Hans van Maaren
ATVA
2004
Springer
87views Hardware» more  ATVA 2004»
15 years 3 months ago
Synthesis of State Feedback Controllers for Parameterized Discrete Event Systems
— This paper considers the state feedback control of parameterized discrete event systems consisting of N similar processes for the problem of maintaining a predicate on the stat...
Hans Bherer, Jules Desharnais, Marc Frappier, Rich...