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ARSCOM
2005
48views more  ARSCOM 2005»
13 years 10 months ago
Properties for a Certain Family of Knot Diagrams
Darrin D. Frey, James A. Sellers
JCT
2010
117views more  JCT 2010»
13 years 9 months ago
(2+2)-free posets, ascent sequences and pattern avoiding permutations
Abstract. We present bijections between four classes of combinatorial objects. Two of them, the class of unlabeled (2 + 2)-free posets and a certain class of involutions (or chord ...
Mireille Bousquet-Mélou, Anders Claesson, M...