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• W2951688181 abstract "This work is intended to contextualize and enhance certain well-studied relationships between Hessenberg varieties and the Toda lattice, thereby building on the results of Kostant, Peterson, and others. One such relationship is the fact that every Lagrangian leaf in the Toda lattice is compactified by a suitable choice of Hessenberg variety. It is then natural to imagine the Toda lattice as extending to an appropriate union of Hessenberg varieties. We fix a simply-connected complex semisimple linear algebraic group $G$ and restrict our attention to a particular family of Hessenberg varieties, a family that includes the Peterson variety and all Toda leaf compactifications. The total space of this family, $X(H_0)$, is shown to be a Poisson variety with a completely integrable system defined in terms of Mishchenko--Fomenko polynomials. This leads to a natural embedding of completely integrable systems from the Toda lattice to $X(H_0)$. We also show $X(H_0)$ to have an open dense symplectic leaf isomorphic to $G/Z times S_{text{reg}}$, where $Z$ is the centre of $G$ and $S_{text{reg}}$ is a regular Slodowy slice in the Lie algebra of $G$. This allows us to invoke results about integrable systems on $Gtimes S_{text{reg}}$, as developed by Rayan and the second author. Lastly, we witness some implications of our work for the geometry of regular Hessenberg varieties." @default.
• W2951688181 created "2019-06-27" @default.
• W2951688181 creator A5079056873 @default.
• W2951688181 creator A5083049265 @default.
• W2951688181 date "2018-07-20" @default.
• W2951688181 modified "2023-09-27" @default.
• W2951688181 title "Hessenberg varieties, Slodowy slices, and integrable systems" @default.
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• W2951688181 doi "https://doi.org/10.48550/arxiv.1807.07792" @default.
• W2951688181 hasPublicationYear "2018" @default.
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