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Singularly Perturbed Reaction-Diffusion Problem with a Boundary Turning Point

机译:具有边界转折点的奇摄动反应扩散问题

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Parameter uniform numerical methods for singularly perturbed reaction diffusion problems have been examined extensively in the literature. By using layer adapted meshes of Bakhvalov or Shishkin type, it is now well established that one can achieve second order (or almost second order in the case of the simpler Shishkin meshes) parameter uniform convergence globally in the pointwise maximum norm. Note that, in proving such results, it is often assumed that the coefficient of the reactive term is strictly positive throughout the domain. In this paper, we examine a problem where the reaction coefficient is zero on parts of the boundary.
机译:奇异摄动反应扩散问题的参数统一数值方法已在文献中得到了广泛研究。通过使用Bakhvalov或Shishkin类型的层适配网格,现在已经很好地确定了,可以在点最大范数上全局实现二阶(或者在简单的Shishkin网格的情况下几乎是二阶)参数均匀收敛。注意,在证明这种结果时,通常假设反应项的系数在整个域中都严格为正。在本文中,我们研究了在部分边界上反应系数为零的问题。

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