Mathematical Institute of the Serbian Academy of Sciences and Arts
|Title:||Continuous and discrete neumann systems on stiefel varieties as matrix generalizations of the jacobi-mumford systems||Journal:||Discrete and Continuous Dynamical Systems- Series A||Volume:||41||Issue:||6||First page:||2559||Last page:||2599||Issue Date:||1-Jun-2021||Rank:||~M21||ISSN:||1078-0947||DOI:||10.3934/dcds.2020375||Abstract:||
We study geometric and algebraic geometric properties of the continuous and discrete Neumann systems on cotangent bundles of Stiefel varieties Vn,r. The systems are integrable in the non-commutative sense, and by applying a 2r × 2r-Lax representation, we show that generic complex invariant manifolds are open subsets of affine Prym varieties on which the complex flow is linear. The characteristics of the varieties and the direction of the flow are calculated explicitly. Next, we construct a family of multi-valued integrable discretizations of the Neumann systems and describe them as translations on the Prym varieties, which are written explicitly in terms of divisors of points on the spectral curve.
|Keywords:||Integrable systems | Invariant tori | Multi-valued mappings | Prym varieties | Spectral curves||Publisher:||American Institute of Mathematical Sciences|
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