2 papers
math.CO2001
Generalizations of Eulerian partially ordered sets, flag numbers, and the Mobius function
Margaret M. Bayer, Gabor Hetyei
A partially ordered set is r-thick if every nonempty open interval contains at least r elements. This paper studies the flag vectors of graded, r-thick posets and shows the smalles…
math.CO1999
Flag vectors of Eulerian partially ordered sets
Margaret M. Bayer, Gabor Hetyei
The closed cone of flag vectors of Eulerian partially ordered sets is studied. It is completely determined up through rank seven. Half-Eulerian posets are defined. Certain limit po…