Concert· Leipzig
What does the cd-index count?
In this talk of the Seminar on Nonlinear Algebra, Felipe Caster Muñoz from the Pontificia Universidad Católica de Chile addresses a long-standing open question in combinatorics: what do the coefficients of the cd-index actually count? He introduces S-partitionable posets — a class generalizing S-shellable spheres and partitionable simplicial complexes — for which the cd-index is non-negative and c