We introduce a weighted quasisymmetric enumerator function associated to generalized permutohedra. It refines the Billera, Jia and Reiner quasisymmetric function which also includes the Stanley chromatic symmetric function. Beside that it carries information of face numbers of generalized permutohedra. We consider more systematically the cases of nestohedra and matroid base polytopes.
For a hypergraphic polytope there is a weighted quasisymmetric function which
enumerates positive integer points in its normal fan and determines its
f-polynomial. This quasisymmetric function invariant of hypergraphs extends
the Stanley chromatic symmetric function of simple graphs. We consider a
certain combinatorial Hopf algebra of hypergraphs and show that universal
morphism to quasisymmetric functions coincides with this enumerator function.
We calculate the f-polynomial of uniform hypergraphic polytopes.
To an extended permutohedron we associate the weighted integer points enumerator, whose principal specialization is the f -polynomial. In the case of poset cones it refines Gessel's P-partitions enumerator. We show that this enumerator is a quasisymmetric function obtained by universal morphism from the Hopf algebra of posets.
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