Abstract
We investigate n-component systems of conservation laws that possess third-order Hamiltonian structures of differential-geometric type. The classification of such systems is reduced to the projective classification of linear congruences of lines in \(\mathbb {P}^{n+2}\) satisfying additional geometric constraints. Algebraically, the problem can be reformulated as follows: for a vector space W of dimension \(n+2\), classify n-tuples of skew-symmetric 2-forms \(A^{\alpha } \in \varLambda ^2(W)\) such that
for some non-degenerate symmetric \(\phi \).
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Acknowledgements
We thank R. Chirivì, N. Hitchin, A. King, J.S. Krasil’shchik, L. Manivel, and A.M. Verbovetsky for clarifying discussions. We acknowledge financial support from GNFM of the Istituto Nazionale di Alta Matematica, the Istituto Nazionale di Fisica Nucleare by IS-CSN4 Mathematical Methods of Nonlinear Physics, and the Dipartimento di Matematica e Fisica “E. De Giorgi” of the Università del Salento. MVP’s work was partially supported by the grant of the Presidium of RAS ‘Fundamental Problems of Nonlinear Dynamics’.
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To Professor Boris Konopelchenko on the occasion of his 70th birthday.
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Ferapontov, E.V., Pavlov, M.V. & Vitolo, R.F. Systems of conservation laws with third-order Hamiltonian structures. Lett Math Phys 108, 1525–1550 (2018). https://doi.org/10.1007/s11005-018-1054-3
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DOI: https://doi.org/10.1007/s11005-018-1054-3
Keywords
- System of conservation laws
- Linear congruence
- Hamiltonian operator
- WDVV equation
- Projective group
- Reciprocal transformation
- Quadratic complex
- Monge metric