Conjecture $\mathcal{O}$ holds for the odd symplectic Grassmannian

Abstract

Let $\mathrm{IG}(k,2n+1)$ be the odd-symplectic Grassmannian. Property $\mathcal{O}$, introduced by Galkin, Golyshev and Iritani for arbitrary complex, Fano manifolds $X$, is a statement about the eigenvalues of the linear operator obtained by the quantum multiplication by the anticanonical class of $X$. We prove that property $\mathcal{O}$ holds in the case when $X=\mathrm{IG}(k,2n+1)$ is an odd-symplectic Grassmannian. The proof uses the combinatorics of the recently found quantum Chevalley formula for $\mathrm{IG}(k,2n+1)$, together with the Perron-Frobenius theory of nonnegative matrices.

arXiv comment9 pages

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Cited by in corpus (1)

• Geometry of horospherical varieties of Picard rank one