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arXiv 1202.3867math.AP
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一类具有非线性边界条件的抛物型方程组的强模整体吸引子

Global attractors in stronger norms for a class of parabolic systems with nonlinear boundary conditions

Martin Meyries

摘要:

对于一类具有非线性Robin边界条件的拟线性抛物型方程组,在高正则性的非线性相空间中构造了一个紧致局部解半流.我们进一步表明,在较低的范数的先验估计是足够的存在一个全球性的吸引子在这个相空间。该方法依赖于最大的$L_p$ -正则性与时间的线性化问题的权重。一个固有的平滑效果,由于权重采用梯度估计。在一些应用中,我们可以通过一个正则性水平来提高到吸引子的收敛性。

英文摘要:

For a class of quasilinear parabolic systems with nonlinear Robin boundary conditions we construct a compact local solution semiflow in a nonlinear phase space of high regularity. We further show that a priori estimates in lower norms are sufficient for the existence of a global attractor in this phase space. The approach relies on maximal $L_p$-regularity with temporal weights for the linearized problem. An inherent smoothing effect due to the weights is employed for gradient estimates. In several applications we can improve the convergence to an attractor by one regularity level.

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