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arXiv 1408.6599math.NAcs.NA
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降阶测试空间下的DPG方法收敛率研究

Convergence rates of the DPG method with reduced test space degree

Portland State University(波特兰州立大学)

T. Bouma, J. Gopalakrishnan, A. Harb

AI总结:

本文基于Aubin-Nitsche对偶定理探讨了DPG方法在弱范数下的更高收敛率,揭示了降阶测试空间下DPG方法的可解性及非一致性分析方法。

摘要:

本文提出了一种Aubin-Nitsche型对偶定理,用于不连续 Petrov-Galerkin (DPG) 方法。该定理解释了在弱范数下观察到的更高收敛率。考虑了Laplace方程的特定例子,即温和-弱 (或原始) DPG方法,获得了两个进一步的结果。首先,当测试空间的次数降低时,DPG方法仍然可解,只要该次数为奇数。其次,开发了一种非一致性分析方法,以解释测试空间降次情况下观察到的收敛率。

英文摘要:

This paper presents a duality theorem of the Aubin-Nitsche type for discontinuous Petrov Galerkin (DPG) methods. This explains the numerically observed higher convergence rates in weaker norms. Considering the specific example of the mild-weak (or primal) DPG method for the Laplace equation, two further results are obtained. First, the DPG method continues to be solvable even when the test space degree is reduced, provided it is odd. Second, a non-conforming method of analysis is developed to explain the numerically observed convergence rates for a test space of reduced degree.

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。

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