Topology of the real part of hyperelliptic Jacobian associated with the periodic Toda lattice

TL;DR

This paper investigates the topology of the real part of hyperelliptic Jacobians linked to the periodic Toda lattice, revealing how solutions with blow-ups influence the manifold's structure and proposing conjectures on its topological properties.

Contribution

It provides a detailed topological analysis of the real manifold of the periodic Toda lattice and introduces conjectures on the Jacobian's topology and compactification mechanisms.

Findings

Manifold is compactified as the real part of a hyperelliptic Jacobian.

Solutions include blow-ups, affecting the manifold's divisor structure.

Conjectures on the topology of the affine part of the Jacobian and gluing rules.

Abstract

This paper concerns the topology of the isospectral {\it real} manifold of the ${\mathfrak sl}(N)$ periodic Toda lattice consisting of $2^{N-1}$ different systems. The solutions of those systems contain blow-ups, and the set of those singular points defines a devisor of the manifold. Then adding the divisor, the manifold is compactified as the real part of the $(N-1)$-dimensional Jacobi variety associated with a hyperelliptic Riemann surface of genus $g=N-1$. We also study the real structure of the divisor, and then provide conjectures on the topology of the affine part of the real Jacobian and on the gluing rule over the divisor to compactify the manifold based upon the sign-representation of the Weyl group of ${\mathfrak sl}(N)$.