2 papers
math.CO2024
Conjectures for cutting pizza with Coxeter arrangements
Richard Ehrenborg
We are interested in conjecturing the sign of the pizza quantity P(H,B(a,R)) for the irreducible Coxeter arrangements H of type A_n, where n=2,3 bmod 4, and type D_n, where n is od…
math.CO2024
Two classes of level Eulerian posets
Richard Ehrenborg
We present two classes of level Eulerian posets. Both classes contain intervals of rank k+1 whose cd-index is the sum over all cd-monomials w of degree k and the coefficient of the…