3 citations · 5 across the 7 of their papers we have counts for
7 papers
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…
Triangulations of and Matching Ensembles
Suho Oh, Hwanchul Yoo
We suggest an axiom system for a collection of matchings that describes the triangulation of product of simplices.
Diagrams of affine permutations, balanced labellings, and symmetric functions
Hwanchul Yoo, Taedong Yun
We generalize the work of Fomin, Greene, Reiner, and Shimozono on balanced labellings in two directions: (1) we define the diagrams of affine permutations and the balanced labellin…
On the purity of maximal weakly separated set families
Hwanchul Yoo
We present a short proof that every maximal family of weakly separated subsets of of cardinality between have the same size. Our proof is direct and only uses element…
Rainbow Graphs and Switching Classes
Suho Oh, Hwanchul Yoo, Taedong Yun
A rainbow graph is a graph that admits a vertex-coloring such that every color appears exactly once in the neighborhood of each vertex. We investigate some properties of rainbow gr…
Triangulations of and Tropical Oriented Matroids
Suho Oh, Hwanchul Yoo
Develin and Sturmfels showed that regular triangulations of can be thought as tropical polytopes. Tropical oriented matroids were defined by Ardila and Dev…
Bruhat order, smooth Schubert varieties, and hyperplane arrangements
Suho Oh, Alexander Postnikov, Hwanchul Yoo
The aim of this article is to link Schubert varieties in the flag manifold with hyperplane arrangements. For a permutation, we construct a certain graphical hyperplane arrangement.…