Sciweavers

COMBINATORICS
2004
80views more  COMBINATORICS 2004»
13 years 11 months ago
Antichains on Three Levels
An antichain is a collection of sets in which no two sets are comparable under set inclusion. An antichain A is flat if there exists an integer k 0 such that every
Paulette Lieby
DM
2008
73views more  DM 2008»
13 years 11 months ago
On multipartite posets
Let m 2 be an integer. We say that a poset P = (X, ) is m-partite if X has a partition X = X1
Geir Agnarsson