Towards the classification of homogeneous third-order Hamiltonian operators
journal contributionposted on 04.02.2016 by Evgeny Ferapontov, Maxim V. Pavlov, R.F. Vitolo
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Let V be a vector space of dimension n + 1. We demonstrate that n-component third-order Hamiltonian operators of differential-geometric type are parametrised by the algebraic variety of elements of rank n in S2(Λ2V) that lie in the kernel of the natural map S2(Λ2V)→Λ4V. Non-equivalent operators correspond to different orbits of the natural action of SL(n + 1). Based on this result, we obtain a classification of such operators for n≤4.
This paper was supportted by GNFM of the Istituto Nazionale di Alta Matematica, the Istituto Nazionale di Fisica Nucleare, and the Dipartimento di Matematica e Fisica \E. De Giorgi" of the Universita del Salento. MVP's work was also partially supported by the grant of Presidium of RAS \Fundamental Problems of Nonlinear Dynamics" and by the RFBR grant 11-01-0019
- Mathematical Sciences