Lagrangian subvarieties of hyperspherical varieties

TL;DR

This paper explores the geometric properties of hyperspherical varieties, conjecturing that certain subvarieties are Lagrangian and establishing a duality between their irreducible components, verified in specific cases.

Contribution

It introduces a conjecture about the Lagrangian nature of zero moment level subvarieties and their duality correspondence, verified in key instances.

Findings

Conjecture that 6X is Lagrangian for hyperspherical varieties.

Established a bijection between irreducible components of dual varieties.

Verified conjectures for all hyperspherical slices and classical Lie superalgebras.

Abstract

Given a hyperspherical $G$-variety $\mathscr X$ we consider the zero moment level $\Lambda_{\mathscr X}\subset{\mathscr X}$ of the action of a Borel subgroup $B\subset G$. We conjecture that $\Lambda_{\mathscr X}$ is Lagrangian. For the dual $G^\vee$-variety ${\mathscr X}^\vee$, we conjecture that that there is a bijection between the sets of irreducible components $\mathrm{Irr}\Lambda_{\mathscr X}$ and $\mathrm{Irr}\Lambda_{{\mathscr X}^\vee}$. We check this conjecture for all the hyperspherical equivariant slices, and for all the basic classical Lie superalgebras.