Wronskians, cyclic group actions, and ribbon tableaux
Wronskians, cyclic group actions, and ribbon tableaux
The Wronski map is a finite, $\mathrm {PGL}_2(\mathbb {C})$-equivariant morphism from the Grassmannian $\mathrm {Gr}(d,n)$ to a projective space (the projectivization of a vector space of polynomials). We consider the following problem. If $C_r \subset \mathrm {PGL}_2(\mathbb {C})$ is a cyclic subgroup of order $r$, how may $C_r$-fixed points are …