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The geometry of Calogero-Moser systems

Jacques Hurtubise;  Thomas Nevins — 2005

Annales de l’institut Fourier

We give a geometric construction of the phase space of the elliptic Calogero-Moser system for arbitrary root systems, as a space of Weyl invariant pairs (bundles, Higgs fields) on the r -th power of the elliptic curve, where r is the rank of the root system. The Poisson structure and the Hamiltonians of the integrable system are given natural constructions. We also exhibit a curious duality between the spectral varieties for the system associated to a root system, and the Lagrangian varieties for...

Pseudo-real principal Higgs bundles on compact Kähler manifolds

Indranil Biswas;  Oscar García-Prada;  Jacques Hurtubise — 2014

Annales de l’institut Fourier

Let X be a compact connected Kähler manifold equipped with an anti-holomorphic involution which is compatible with the Kähler structure. Let G be a connected complex reductive affine algebraic group equipped with a real form σ G . We define pseudo-real principal G -bundles on X . These are generalizations of real algebraic principal G -bundles over a real algebraic variety. Next we define stable, semistable and polystable pseudo-real principal G -bundles. Their relationships with the usual stable, semistable...

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