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» The Alcuin Number of a Graph
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ARSCOM
2002
53views more  ARSCOM 2002»
15 years 6 months ago
Embedding Graphs Containing K5-Subdivisions
Given a non-planar graph G with a subdivision of K5 as a subgraph, we can either transform the K5-subdivision into a K3,3-subdivision if it is possible, or else we obtain a partit...
Andrei V. Gagarin, William Kocay
CAV
2006
Springer
121views Hardware» more  CAV 2006»
15 years 10 months ago
Deriving Small Unsatisfiable Cores with Dominators
Abstract. The problem of finding a small unsatisfiable core of an unsatisfiable CNF formula is addressed. The proposed algorithm, Trimmer, iterates over each internal node d in the...
Roman Gershman, Maya Koifman, Ofer Strichman
CGF
2008
110views more  CGF 2008»
15 years 6 months ago
Motorcycle Graphs: Canonical Quad Mesh Partitioning
We describe algorithms for canonically partitioning semi-regular quadrilateral meshes into structured submeshes, using an adaptation of the geometric motorcycle graph of Eppstein ...
David Eppstein, Michael T. Goodrich, Ethan Kim, Ra...
COMBINATORICS
2006
118views more  COMBINATORICS 2006»
15 years 6 months ago
Noncrossing Trees and Noncrossing Graphs
We give a parity reversing involution on noncrossing trees that leads to a combinatorial interpretation of a formula on noncrossing trees and symmetric ternary trees in answer to a...
William Y. C. Chen, Sherry H. F. Yan
DAM
2006
116views more  DAM 2006»
15 years 6 months ago
Using graphs for some discrete tomography problems
Given a rectangular array where entries represent the pixels of a digitalized image, we consider the problem of reconstructing an image from the number of occurrences of each colo...
Marie-Christine Costa, Dominique de Werra, Christo...