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

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

2010-12-10

arxiv.org/abs/1012.2365v2

Physics

Mathematical Physics

6 pages, AMS-LaTeX, extended version

Scientific paper

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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