2 papers
math.CO2017
Weighted quasisymmetric enumerator for generalized permutohedra
Vladimir Grujić, Marko Pešović, Tanja Stojadinović
We introduce a weighted quasisymmetric enumerator function associated to generalized permutohedra. It refines the Billera, Jia and Reiner quasisymmetric function which also include…
math.CO2012
Hopf algebra of building sets
Vladimir Grujić, Tanja Stojadinović
The combinatorial Hopf algebra on building sets extends the chromatic Hopf algebra of simple graphs. The image of a building set under canonical morphism to quasi-symmetric…