海量图书期刊资源,随时随地畅享阅读乐趣
Proportional transitivity in linear extensions of ordered setsP.C Fishburn · 1986
On extensions, linear extensions, upsets and downsets of ordered setsRicardo C. Corrêa; Jayme L. Szwarcfiter · 2005
Minimizing bumps in linear extensions of ordered setsPeter C. Fishburn; William V. Gehrlein · 1986
Super-Greedy Linear Extensions of Ordered SetsH. A. KIERSTEAD; W. T. TROTTER · 1989
On Extensions, Linear Extensions, Upsets and Downsets of Ordered Sets (Extended Abstract)Ricardo C. Corrâa; Jayme L. Szwarcfiter · 2000
On linear extensions of ordered sets with a symmetryBernhard Ganter; Gerhart Häfner; Werner Poguntke · 1987
On Operations and Linear Extensions of Well Partially Ordered SetsMaciej Malicki; Aleksander Rutkowski · 2004
A structure theory for ordered setsDwight Duffus; Ivan Rival · 1981
Greedy linear extensions with constraintsIvan Rival; Nejib Zaguia · 1987
Retract rigid cartesian products of graphsRichard Nowakowski; Ivan Rival · 1988
Is there a diagram invariant?Maurice Pouzet; Ivan Rival · 1989
Drawing orders with few slopesJurek Czyzowicz; Andrzej Pelc; Ivan Rival · 1990
Enumerating orientations of ordered setsWei-Ping Liu; Ivan Rival · 1991
Inversions, cuts, and orientationsWei Ping Liu; Ivan Rival · 1991
Perpendicular ordersIvan Rival; Nejib Zaguia · 1995