Isotopy invariance and stratified ${\mathbb{E}}_2$-structure of the Ran Grassmannian

Guglielmo Nocera, Morena Porzio

Let $G$ be a complex reductive group. A folklore result asserts the existence of an ${\mathbb{E}}_2$-algebra structure on the Ran Grassmannian of $G$ over ${\mathbb{A}}_{\mathbb{C}}^1$…