11 citations · 57 across the 33 of their papers we have counts for
27 papers · 1 filter
The toric g-vector of nestohedra
Richard Ehrenborg, Gábor Hetyei, Margaret Readdy
We show the entries of the toric g-vector of any dual simplicial polytope is a nonnegative integer linear combination of its gamma-vector entries. We give combinatorial interpretat…
On the structure of the d-indivisible noncrossing partition posets
Richard Ehrenborg, Gábor Hetyei
We study the poset of d-indivisible noncrossing partitions introduced by Mühle, Nadeau and Williams. These are noncrossing partitions such that each block and each dual block has c…
Labeling regions in deformations of graphical arrangements
Gábor Hetyei
Combining Carver's variant of the Farkas' lemma with the Flow Decomposition Theorem we show that the regions of any deformation of a graphical arrangement may be bijectively labele…
Catalan-Spitzer permutations
Richard Ehrenborg, Gábor Hetyei, Margaret Readdy
We study two classes of permutations intimately related to the visual proof of Spitzer's lemma and Huq's generalization of the Chung-Feller theorem. Both classes of permutations ar…
Spanning hypertrees, vertex tours and meanders
Robert Cori, Gábor Hetyei
This paper revisits the notion of a spanning hypertree of a hypermap introduced by one of its authors and shows that it allows to shed new light on a very diverse set of recent res…
The type permutohedron and the poset of intervals as a Tchebyshev transform
Gábor Hetyei
We show that the order complex of intervals of a poset, ordered by inclusion, is a Tchebyshev triangulation of the order complex of the original poset. Besides studying the propert…