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This https://t.co/0578EN8tOU has been replaced. Links: https://t.co/1bntxUx27R https://t.co/gGL9sWtzAy https://t.co/XeqVBepq4B https://t.co/HqknyfSnnk
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theory of water waves and the Fermi-Pasta-Ulam system. [3/3 of https://t.co/qwV9xcaxNP]
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derivatives of higher order, the local field theory is equivalent, in the sense of the Hamiltonian normal form, to that of the Korteweg-de Vries hierarchy of second order. Within this framework, we explain the connection between the [2/3 of https://t.co/qw
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In the present work we analyse the structure of the Hamiltonian field theory in the neighbourhood of the wave equation $q_{tt}=q_{xx}$. We show that, restricting to "graded" polynomial perturbations in $q_x$, $p$ and their space [1/3 of https://t.co/qwV9xc