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首页> 外文期刊>Revista matematica iberoamericana >On continuation properties after blow-up time for L-2-critical gKdV equations
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On continuation properties after blow-up time for L-2-critical gKdV equations

机译:关于L-2关键GKDV方程的爆破时间延续性能

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In this paper, we consider a blow-up solution u(t) (close to the soliton manifold) to the L-2-critical gKdV equation partial derivative(t)u (u(xx + )u(5))(x) = 0, with finite blow-up time T < +infinity. We expect to construct a natural extension of u(t) after the blow-up time. To do this, we consider the solution u(gamma)(t) to the saturated L-2-critical gKdV equation partial derivative(t)u vertical bar(u(xx) vertical bar u(5) - gamma u vertical bar u vertical bar(q-1))(x) = 0 with the same initial data, where gamma > 0 and q > 5. A standard argument shows that u(gamma)(t) is always global in time. Moreover, for all t < T, u(gamma)(t) converges to u(t) in H-1 as gamma -> 0. We prove in this paper that for all t >= T, u(gamma)(t) -> v(t) as gamma -> 0, in a certain sense. This limiting function v(t) is a weak solution to the unperturbed L-2-critical gKdV equations, hence can be viewed as a natural extension of u(t) after the blow-up time.
机译:在本文中,我们考虑一个爆破解决方案U(t)(靠近孤子歧管)到L-2-临界GKDV方程部分衍生物(T)U(U(XX +)U(5))(x )= 0,有限吹气时间t <+无限远。 我们希望在灌浆时间后构建U(T)的自然延伸。 为此,我们将解决方案U(伽马)(t)考虑到饱和L-2-关键的GKDV方程部分导数衍生物(T)U垂直条(U(XX)垂直条U(5) - 伽马U垂直条U 垂直条(Q-1))(x)= 0,具有相同的初始数据,其中伽马> 0和q> 5.标准参数显示U(伽马)(t)始终是全局的。 此外,对于所有T 0.我们在本文中证明了所有T> = T,U(伽马)(t ) - > v(t)作为伽马 - > 0,在某种意义上。 该限制函数V(t)是未受干扰的L-2关键GKDV方程的弱解决方案,因此可以在灌浆时间之后被视为U(T)的自然延伸。

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