3 problems

Let $A$ be a generic matrix, let $u$ be the diagonal irregular-type parameter, and let $S_+(u,A,\varepsilon)$ be the upper triangular Stokes matrix with $S_-=S_+^\dagger$. Write…

Let $T(n,\mathbb R)$ be the space of upper triangular matrices under consideration. A Seifert form stratum is a union of components of a fiber of the map to isomorphism classes of…

Let $X$ be a Fano manifold, let $\mathcal{H}_X=H^\bullet(X)\otimes\mathcal{O}_{\mathbb{C}_z}$, and let … be its quantum connection at quantum parameter $\tau=0$. Assume that the qu…