arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0709.3848nlin.SI
收藏

KdV6:一个可积系统

KdV6: An Integrable System

Boris A. Kupershmidt

摘要:

$K^2 S^2 T [5]$最近推导出了一个新的6阶$^{th}$波动方程$KdV6$:$(\partial^2_x + 8u_x \partial_x + 4u_{xx})(u_t + u_{xxx} + 6u_x^2) = 0$,发现了一个线性问题和对其的自动B ${\ddot{\rm{a}}}$ ckclund变换,并推测了其通常意义上的可积性。我们证明了这个猜想,通过构建一个无限的交换层次$KdV_n6$与一个共同的无限集的保守密度。给出了一个适用于任何双Hamilton系统(如所有标准Lax方程,连续的和离散的)的一般构造,给出了它的一个非完整扰动,并证明了这个扰动是保持可积性的.这一猜想在几个典型的例子中得到了验证:经典长波方程、户田格(连续和离散)和欧拉顶。

英文摘要:

$K^2 S^2 T [5]$ recently derived a new 6$^{th}$-order wave equation $KdV6$: $(\partial^2_x + 8u_x \partial_x + 4u_{xx})(u_t + u_{xxx} + 6u_x^2) = 0$, found a linear problem and an auto-B${\ddot{\rm{a}}}$ckclund transformation for it, and conjectured its integrability in the usual sense. We prove this conjecture by constructing an infinite commuting hierarchy $KdV_n6$ with a common infinite set of conserved densities. A general construction is presented applicable to any bi-Hamiltonian system (such as all standard Lax equations, continuous and discrete) providing a nonholonomic perturbation of it. This perturbation is conjectured to preserve integrability. That conjecture is verified in a few representative cases: the classical long-wave equations, the Toda lattice (both continuous and discrete), and the Euler top.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑