2 papers
math.CO2019
Palindromic intervals in Bruhat order and hyperplane arrangements
Robert Mcalmon, Suho Oh, Hwanchul Yoo
An element of the Weyl group is called rationally smooth if the corresponding Schubert variety is rationally smooth. This happens exactly when the lower interval in th…
math.CO2017
The rank function of a positroid and non-crossing partitions
Robert Mcalmon, SuHo Oh
A positroid is a special case of a realizable matroid, that arose from the study of totally nonnegative part of the Grassmannian by Postnikov. Postnikov demonstrated that positroid…