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JCT
2006
64views more  JCT 2006»
13 years 11 months ago
Inequalities between Littlewood-Richardson coefficients
We prove that a conjecture of Fomin, Fulton, Li, and Poon, associated to ordered pairs of partitions, holds for many infinite families of such pairs. We also show that the bounded ...
François Bergeron, Riccardo Biagioli, Merce...
EJC
2010
13 years 11 months ago
Maps admitting trialities but not dualities
We use group theory to construct infinite families of maps on surfaces which are invariant under Wilson's map operations of order 3 but not under the operations of order 2, s...
Gareth A. Jones, Andrew Poulton
STOC
2001
ACM
119views Algorithms» more  STOC 2001»
14 years 11 months ago
Complex tilings
Two infinite families of self-similar tilings are described which have apparently not been reported before. Each tiling is based on a single prototile that is a segment of a regul...
Bruno Durand, Leonid A. Levin, Alexander Shen