Integrable systems and a moduli space for (1,6)-polarised abelian surfaces
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Abstract
A Hamiltonian system is a type of differential equation used in physics to describe the evolution of a mechanical system like a particle in a potential. Certain particularly well-behaved Hamiltonian systems are called integrable. For us an integrable system on C^(2n) is simply a set of n independent Poisson-commuting polynomials in 2n variables. In case the system is algebraically completely integrable the fibres of the induced map are affine parts of abelian varieties.
In this thesis we study a projective model for the moduli-space of embedded (1,6)-polarised abelian surfaces first described by Gross and Popescu. We analyse its discriminant locus, the degenerations occurring, the form of the equations describing each surface and the automorphisms of this moduli space.
In the last chapter we compute the cohomology of some quasi-homogeneous integrable systems on C^4.