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arXiv math-ph/0510032math-phmath.MPnlin.SI
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关于双曲守恒律组的Hamilton扰动,II:临界行为的普适性

On Hamiltonian perturbations of hyperbolic systems of conservation laws, II: universality of critical behaviour

Boris Dubrovin

摘要:

研究了最简双曲型方程$u_t + a(u) u_x=0$的Hamilton扰动.我们认为,扰动方程的解在未扰动方程的梯度突变点附近的行为应该基本上独立于一般扰动的选择,也不依赖于一般解的选择。此外,这种行为描述了一个特殊的解决方案,可积的四阶常微分方程。

英文摘要:

Hamiltonian perturbations of the simplest hyperbolic equation $u_t + a(u) u_x=0$ are studied. We argue that the behaviour of solutions to the perturbed equation near the point of gradient catastrophe of the unperturbed one should be essentially independent on the choice of generic perturbation neither on the choice of generic solution. Moreover, this behaviour is described by a special solution to an integrable fourth order ODE.

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