Algebraic and enumerative combinatorics seminar-Hunter Spink

Title: New perspectives on quasisymmetry via divided differences, flag varieties, etc.

 Abstract: In this talk we will introduce a new combinatorial approach to understanding quasisymmetric polynomials via a quasisymmetric analogue of "divided differences". The resulting combinatorial theory is paired with a geometric theory that closely follows the classical development of Schubert calculus and Schubert varieties. Next week Nantel Bergeron will continue with the torus-equivariant story.

There will be a pre-seminar presenting relevant background at the beginning graduate level starting at 1pm,