2 problems

A positroidal triangulation or dissection of the amplituhedron is a collection of positroid cells whose full-dimensional images form the corresponding subdivision. Previously const…

Let $\mathcal{J}\subset {[n]\choose k}$ be an arrangement of largest minors, and let $W\in {[n]\choose k}$. Say that $W$ is $(\geq t,\mathcal{J})$-largest if, for every arrangement…