Rotationally symmetric plabic graphs and the Lagrangian Grassmannian

Olha Shevchenko

We introduce the totally nonnegative Lagrangian Grassmannian ${\mathrm{LG}}_{\ge 0}^{\mathrm{R}}(\mathrm{n},2n)$, a new subset of the totally nonnegative Grassmannian consisting of subspaces isotropic wit…