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arXiv · 1012.2365

The Darboux coordinates for a new family of Hamiltonian operators and linearization of associated evolution equations

Jirina Vodova
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Abstract

A. de Sole, V. G. Kac, and M. Wakimoto (arXiv:1004.5387) have recently introduced a new family of compatible Hamiltonian operators of the form $H^{(N,0)}=D^2\circ((1/u)\circ D)^{2n}\circ D$, where $N=2n+3$, $n=0,1,2,...$, $u$ is the dependent variable and $D$ is the total derivative with respect to the independent variable. We present a differential substitution that reduces any linear combination of these operators to an operator with constant coefficients and linearizes any evolution equation which is bi-Hamiltonian with respect to a pair of any nontrivial linear combinations of the operators $H^{(N,0)}$. We also give the Darboux coordinates for $H^{(N,0)}$ for any odd $N\geqslant 3$.

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Jirina Vodova. 2011-03-31. The Darboux coordinates for a new family of Hamiltonian operators and linearization of associated evolution equations. https://doi.org/10.1088/0951-7715%2F24%2F9%2F011

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