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N-free posets as generalizations of series-parallel posets

โœ Scribed by M. Habib; R. Jegou

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
474 KB
Volume
12
Category
Article
ISSN
0166-218X

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To every linear extension L of a poset P = (P. < ) we associate a 0, l-vector x =x(L) with xc = 1 if and only if e is preceded by a jump in L or e is the first element in L. Let the setup polyhedron .Y = conv{x(l): L E U(P)} be the convex hull of the incidence vectors of all linear extensions of P.