Polyhedral and Tropical Geometry of Flag Positroids

Jonathan Boretsky, Christopher Eur, Lauren Williams

A flag positroid of ranks $\mathbf{r}:=(r_1<\cdots <r_k)$ on $[n]$ is a flag matroid that can be realized by a real $r_k\times n$ matrix $A$ such that the $r_i\times r_i$ mino…